血浓于水英文

英语谚语500句,俚语俗语与谚语专题

aheartofgold道德高尚的人

aheartofoak果断的人

astitchintimesavesnine一劳永逸

abadworkmanquarrelswithhistools不会睡觉怪床歪

abirdinthehandisworthtwointhebush十鸟在树，不如一鸟在手

abittrying有些苦恼

aburntchilddreadsthefire一朝被蛇咬，十年怕井绳

acatmaylookataking一视何伤

aconstantguestisneverwelcome久住令人贱

acontentedmindisaperpetualfeast知足常乐

acrookedstickwillhaveacrookedshadow上梁不正下梁歪

afriendiasierlostthanfound朋友易失不易得

agoodbeginningishalfdone能善其始，事已半成

agoodbeginningmakesagoodending善始善终

agoodgaintakeslongpain好事多磨

agoodlatherishalfashave良好的开端等于成功的一半

agoodnameisbetterthanriches名声好，胜金宝

agoodtaleisnonetheworforbeingtoldtwice好戏不厌百回看

ajackofalltradesismasterofnone样样精通样样稀松

alittlelearningisadangerousthing一知半解是危险的事。

amancannotwhistleanddrinkatthesametime一心不能两用

amanwithoutasmilingfacemustnotopenashop人无笑脸不开店

amissisasgoodasamile失之毫厘，差之千里

anearneighborisbetterthanadistantcousin远亲不如近邻

anecessarylieisharmless必要的谎言无妨

apinadayisagroatayear聚沙成塔

areformedrakemakesthebesthusband浪子回头金不换

arollingstonegathersnomoss转石不成苔，转业不聚财

astoneinawallisnotlost金簪掉在井里头?有你的就是有你的

astrawshowswhichwaythewindblows见微知著

awhiteelephant暴殄天珍

awordinoughtothewi快马一鞭

awordspokenispastrecalling一言既出，驷马难追

aworkilldonemustbetwicedone首次做不好，必须重新做

ayoungidler,anoldbeggar少壮不努力，老大徒伤悲

abnt-mindedprofessor无头苍蝇

actone'sage适龄行为

actionsspeaklouderthanwords行动胜于言辞,坐而言，不如起而行

afterafashion差劲

atone'swit'nd智穷才尽

afterastormcomesacalm雨过天晴

allgoodthingscometoanend好花不常开，好景不常在

allisfairinloveandwar情场如战超不择手段

allisfishthatcomestothenet抓到篮里便是菜

alllayloadsonawillinghor人善被人欺，马善被人骑

allroadsleadtoroma条条大道通罗马殊途同归

allthatglittersisnotgold闪光的东西并非都是金子

allthingsaredifficultbeforetheyareeasy万事起头难

all'swellthatendswell结局好的就算好

amissisasgoodasamile差之毫厘，失之千里

anaxtogrind图谋不轨

anemptysackcannotstandupright空袋立不直

aneyeforaneye,andatoothforatooth以眼还眼，以牙还牙

anhourinthemorningisworthtwointheevening一日之间在于晨

anonlookeresmostofthegame旁观者清

appearancesaredeceptive人不可貌相

artislong,butlifeisshort人生有限，学海无涯

artislong,lifeisshort人生朝露，艺业千秋

asalways一如既往

aspoorasachurchmou一贫如洗

asredasaro艳如桃花

aswellbehangedforasheepasalamb一不做二不休

aswetasadrownedrat湿如落汤鸡

asyoubrewsoyoumustdrink自作自受

asyoumakeyourbed,soyoumustlieinit自食其果,自作自受

asyousow,soshallyoureap种豆得豆，种瓜得瓜

asssthesituation,gowiththetide审时度势，顺应潮流

amanwhohasfriendsmustshowhimlffriendly要想交朋友，就得有诚意

ahundredpoundsofsorrowpaysnotoneounceofdebt百镑愁难还一分债

agoodbeginningishalfdone.,wellbegunishalfdone良好的开端就是成功的一半

agoodbookisthebestfriends,thesametodayandforever好书如挚友，情谊永不

anhonesttalespeedsbest,beingplainlytold诚实的故事，哪怕是平淡地讲，也传得最快

athree-hundred-milejourneystartswiththefirststep千里之行,始于足下

afoolmaythrowastoneintoawellwhichahundredwimencannotputout一愚闯祸，百智难补

afriendinneedisafriendindeed,testedfriends,sharewealandwoe患难中的朋友才是真正的朋友,雪中送炭真君子

sandplantsfacingthesungrowbetter近水楼台先得月，向阳花木早逢

春。

backandforth前前后后

badnewstravelsfast坏事传千里

barkingdogsldombite爱叫的狗很少咬人

becarefulwiththingandmercifulwithpeople对物要爱惜，对人要感恩

befar-sighted目光远大

beinthesameboat同舟共济

bekeptwaitingforsometime苦苦等候

beopenandaboveboard光明磊落

betruetoone'sname名副其实

beveryungrateful以怨报德

beautyisbutskindeep人不可貌相

beautyisintheeyeofthebeholder情人眼里出西施

beautyisonlyskin-deep人不可貌相

beggarsmustnotbechoors饥不择食

bellthecat风险重重

betterlatethannever迟做总比不做好

bettermasteronethanengagewithten会十事不如精一事

birdsofafeatherflocktogether鸟以群分，物以类聚

bitethehandthatfeedsone忘恩负义

bitterpillsmayhavewholesomeeffects良药苦口

bloodisthickerthanwater疏不间亲,血浓于水

bonkers疯狂的

bothfeetontheground实事求是

boyswillbeboys男孩子毕竟是男孩子

brazen-faced厚脸皮

burnone'sboats破釜沉舟

buryone'sheadinthesand无视事实

businesscomesbeforepleasure正事在先，玩乐在后

bygeorge的确

bythegrapevine小道消息

canofworms一团糟

cannotethewoodforthetrees只见树木不见森林

carrythecan面对责备,负起责任

changewitheachpassingday日新月异

chaos乌烟瘴气

clothesdonotmaketheman人不可貌相

clothesmaketheman人要衣装，佛要金装

comeacrossatigerinthemountain山中遇虎

comestraighttothepoint开门见山

comingeventscasttheirshadowsbefore山雨欲来风满楼

comparisonsareodious人比人，气死人

constantdroppingwearsawaythestone滴水穿石

coolone'sheels坐冷板凳

custommakesallthingasy熟能生巧

customreconcilesustoeverything习惯成自然

cutyourcoataccordingtoyourcloth量入为出

deadmentellnotales死无对证

dealwithamanashedealswithyou以其人之道还治其人之身

deli(delicatesn)熟食店

derveone'sreputation名不虚传

diamondcutdiamond强中更有强中手

diligenceisthemotherofsuccess失败是成功之母

disco(discotheque)迪斯科

divi(dividend)红利

doasisay,notasido照我说的做，别照我做的做

doasyouwouldbedoneby己所不欲,勿施于人

doevilthatgoodmaycome行恶以求善果

doinromeastheromansdo入乡随俗

don'tcountyourchickensbeforetheyarehatched别过早地乐观

don'tcrossthebridgeuntilyoucometoit不要杞人忧天

don'tcrystinkingfish不要喊鱼腥,卖瓜不说瓜苦,老王卖瓜，自卖自夸

don'tletthecatoutofthebag不要泄露机密

don'tmeettroublehalf-way勿杞人忧天

don'tputallyoureggsinonebasket勿孤注一掷

don'tputofftilltomorrowwhatshouldbedonetoday今日事今日毕

don'tquarrelwithyourbreadandbutter端人家碗，服人家管

don'tridethehighhor勿摆架子

don'tteachyourgrandmothertosuckegg不要对着耶稣讲道理

don'twashyourdirtylineninpublic家丑不外扬

don'tprimetjudgeapersonbytheclotheshewears不能以貌取人

down-to-earth平易近人

drawworldwideattention举世瞩目

earlytobedandearlytori早睡早起

easiersaidthandone说起来容易，做起来难

eastorwest,homeisbest管他东方或西方，家是最好的地方

easycome,easygo来的容易去的快

easymeat易辨的事

emptyveslsmakethemostsound满瓶不响半瓶响叮当

engageinspeculation投机倒把,买空卖空

enjoyahappyget-together欢聚一堂

enjoypopularsupport深入人心

enoughisasgoodasafeast知足常乐

equalpayforequalwork同工同酬

evenhomersometimesnods智者千虑必有一失

everydoghashisday困龙也有上天时

everyfamilyhasaskeletoninthecupboard家家有本难念的经

everyflowmusthaveitbb人有悲欢离合，月有阴晴圆缺

everylittlecountshelps积少成多

everymanishisownworstenemy一个人最大的敌人就是他自己

everynowandthen时时刻刻

everyonetohistaste人各有所好

exampleisbetterthanprecept身教重於言教

experienceisthebestteacher前事不忘後事之师

experienceisthemotherofwisdom不经一事，不长一智

extremesmeet物极必反

factsspeaklouderthanwords事实胜于雄辩

failureisthemotherofsuccess失败为成功之母

faint-hearted胆小的

familiaritybreedscontempt近之则不逊

feellikeanoldfriendsatfirstsight一见如故

finefeathersmakefinebirds人要衣装，马要鞍

firstcome,firstrved先来先招待

firstimpressionsaremostlasting先入为主

firsttimestrangers,condtimefriends一回生,二回熟

followtheriverandyouwillgettothea顺藤摸瓜

foolsrushinwhereangelsfeartotread初生牛犊不怕虎

footthebill付帐

don'tdountootherswhatyoudon'twantothersdountoyou己所不欲勿施于人

beallfingersandthumbs(beveryawkwardandclumsyinhandlingthings)做事笨手笨脚

betterthedevilyouknowthanthedevilyoudonotknow明枪易躲，暗箭难防

buyerswantahundredeyes;llers，none买东西的要有百只眼，卖东西的可以不长眼

craftmusthaveclothes,buttruthlovestogonaked诡计需要伪装，真理喜欢阳光

everydoghasits,hisdayamanhishour,andadoghashisday人人均有得意

emptytalkswouldleadthecountryastray,andhardworkcanrejuvenatethenation空谈误国,实干兴邦

gatheryerobudswhileyemay花开堪折直须折

gettheoppositeofwhatoneintended事与愿违

getthesack炒鱿鱼

giveadogabadnameandhanghim谗言可畏,欲加之罪，何患无辞

giveathiefenoughropeandhe,llhanghimlf多行不义必自毙

givehimaninchandhe'lltakeanell得寸进尺

giveknavesaninchandtheywilltakeayard得寸进尺

goforbroke尽最大努力

gowhilethegoingisgood三十六计,走为上计

godhelpsthowhohelpthemlves自助者天助之

goldwillnotbuyeverything金钱并非万能

goodthingscomeinsmallpackages乡人不识货，尽捡大的摸

goodwineneedsnobush酒香不怕巷子深

graspall,loall样样都要，全都失掉

greatmindsthinkalike英雄所见略同

greatoaksfromlittleacornsgrow万丈高楼从地起

growwitheverypassingdayflourishing蒸蒸日上

halfaloafisbetterthannobread聊胜於无

hardandfast一成不变

hard-hearted铁石心肠的

hastemakeswaste欲速则不达

haveone'swishfulfilled如愿以偿

helaughsbestwholaughslast最后笑的人笑得最得意

hethatcommitsafaultthinkveryonespeaksofit作贼心虚

hethathathafullpurneverwantedafriend有钱有酒，必有朋友

hethatisfullofhimlfisveryempty自满的人是空虚的

hethattouchespitchshallbedefiled近朱者赤，近墨者黑

hewhoknowsmostspeaksleast识多者寡言

hewholaughslast,laughsbest谁笑在最后谁笑得最甜

hewhoridesatigerisafraidtodismount骑虎难下

heartandsoul全心全意地

heartofstone石头心肠

heart-to-heart坦白的

heavenhelpsthowhohelpthemlves天助自助者

homersometimesnods圣贤也有缺失

honestyisthebestpolicy诚实是上策

howhappyweare,tomeetfriendsfromafar!有朋自远方来,不亦乐乎!

hungeristhebeatsauce饥不择食

iftheskyfalls,weshallcatchlarks杞人忧天

ifyoukillonefleainmarchyoukillahundred二月杀跳蚤，杀一少百

ifyourunaftertwohares,you'llcatchneither脚踏两头船摆渡难

inahundredandonethousandways千方百计

indoing,welearn经一事，长一智

infairweatherprepareforthefoul未雨绸缪

inforapenny,inforapound一不做，二不休

inone'sheartofheart在内心深处

inspiteofonelf不由自主

inthecountryoftheblindtheone-eyedmanisking比上不足，比下有余

inwinethereistruth酒後吐真言

issueious打白条

itgoesinoneearandouttheother左耳朵进，右耳朵出

itisdoggedthatdoesit天下无难事，只怕有心人

itiasiertogoupthehillthantorundown上山容易，下山难

itiasiertopulldownthantobuild百年成之不足，一旦毁之有余

itislovethatmakestheworldgoround情之一字，所以维持世界

itisnevertoolatetomend亡羊补牢，时犹未晚

itisnoucryingoverspiltmilk既坠釜甑，反顾无益

ittakestwotomakeaquarrel一个巴掌不响

it'sadeal一言为定

it'salongstory一言难尽

it'snevertoolatetolearn活到老，学到老

it'snevertoolatetomend亡羊补牢，未为晚也

it'sofgreaturgencythat当务之急

it'slf-evidentthat不言而喻

it'sthenatureofbeasts本性难移

itprimeasytobewiaftertheevent事后诸葛亮

justicehaslongarms天网恢恢,疏而不漏

keepsomethingforarainyday未雨绸缪

killtwobirdswithonestone一箭双雕,一石二鸟

kind-hearted心地慈祥的

knowledgeispower知识就是力量

learnfromother'sstrongpointsandclothegap取长补短

learntomeetpracticalneeds学以致用

learntowalkbeforeyourun循序渐进

letbygonesbebygones既往不究

letsleepingdogslie莫惹是非,一动不如一静

letthingsruntheircour听其自然

lifeisbutemptydream浮生若梦

likealeadballoon毫无作用

likefather,likeson有其父必有其子

littleandoftenfillsthepur集腋成裘

liveandlearn活到老学到老,学无止境

lookbacktotheold,ifyouwouldlearnthenew温故而知新

lookbeforeyouleap三思而后行

lookers-onemostofthegame旁观者清

losttimeisneverfoundagain光阴一去不复返

loveme,lovemydog爱屋及乌

makegreat,rapidstrides突飞猛进

makehaywhilethesunshines打铁趁热

makeoverallarrangements统筹兼顾

makespectacleofonelf出洋相

makeyourlfallhoneyandthefileswilldevouryou招蜂引蝶

manpropos,goddispos谋事在人，成事在天

manyalittlemakesamickle积少成多

manyhandsmakelightwork人多力量大,只要人手多，牌楼搬过河

manymen,manyminds百姓百姓，一百个心

marble-hearted铁右心肠

marriagesaremadeinheaven姻缘天注定

menareblindintheirowncau人不知自丑，马不嫌脸长

merchantofdeath死亡贩子

mightisright强权即公理

misfortunesnevercomesingly祸不单行

mod(modern)时髦的,摩登的

moneybegetsmoney钱赚钱

moneyburnsaholeinhispocket钱烧口袋漏，一有就不留

moneyiverything有钱能使鬼推磨

moneyistherootofallevil金钱是万恶之源

moneymakesthemarego有钱能使鬼推魔

moneytalks金钱万能,有钱能使鬼推磨

morehaste,lessspeed欲速则不达

murderwillout纸包不住火

mutualunderstandingandmutualaccommodation互谅互让

hewhowouldclimbtheladdermustbeginatthebottom千里之行,始于足下

knowledgewithoutpracticemakeshalfasartist有知识无实践只是半个艺术家

halftheworldknowsnothowtheotherhalflives一家不知一家事，神仙不知瓜里事

goodopportunity,favorablegeographicallocationandsupportfromthepeople天时、地利、人和

learningislikeswimmingupstreamifyoudon'tgoforward,you'llgoback学如逆水行舟，不进则退

ittakestenyearstogrowtreesbutahundredyearstoeducatepeople十年树木,百年树人

nat(mationalist)民族主义者

necessityknowsnolaw饥寒起盗心

neitherfishnorflesh非驴非马

networkofpersonalconnections关系网

neut(neutronbomb)中子弹

nevercackletillyoureggislaid事未完成莫夸耀

neverdothingsbyhalves凡事不要半途而废

neverjudgebyappearances人不可貌相

nevermindtroubletroublesyou明日愁来明日忧

neverputofftilltomorrowwhatmaybedonetoday今日事，今日毕

neverputoffwhatcanbedonetodaytilltomorrow今日之事今日毕

newbroomsweepsclean新官上任三把火

nocross,nocrown吃得苦中苦，方为人上人

nogainwithoutpain舍不得儿子，套不了狼

nopains,nogains不劳则无获

nowork,nomoney不劳无获

nottowearyourheartonyoursleeve不要太情绪化

nothingisimpossibletoawillingheart世上无难事，只怕有心人

nullandvoid空洞无物

obedienceisthefirstdutyofasoldier服从是的天职

oftwoevilschoothelesr两害相权取其轻

offandon断断续续

oldchap老兄

oldfriendsandoldwinearebest陈酒味纯，老友情深

onone'slastlegs日暮途穷

oncebitten,twiceshy一回遭蛇咬，二回不攒草

onecannotbeintwoplacesatonce分身乏术

onecannotmakeanomeletwithoutbreakingeggs有得必有失

onecannotputbacktheclock盛年不重来，一日难再晨

onefatherismorethanahundredschoolmasters胜过师长百位

onegoodturndervesanother好心有好报

oneisnevertoooldtolearn活到老，学到老

onemansowsandanotherreaps东家种竹，西家生笋

onemustdrawbackinordertoleapbetter以退为进

onepairofheelsisoftenworthtwopairsofhands走为上策

oneswallowdoesnotmakeasummer单丝不成线，独木不成林

one'spoundofflesh合理不合情之要求

opportunitymakesthethief财不露白

outofsight,outofmind眼不见，心不想

overshoes,overboots一不做，二不休

pell-melldevelopment盲目发展,欲速则不达

pennywi,poundfoolish小事精明，大事糊涂

peoplewholiveinglasshousshouldnotthrowstones责人必先责己

personofinsight有识之士

playbyear到时再看

pleagivemeahand请帮我一个忙

posh非常时髦的

practicemakeperfect熟能生巧

prentthefactsandreasonthingsout摆事实讲道理

prettyfeathersmakeprettybirds人要衣装

pridecomes,goesbeforeafall骄兵必败

readingmakesafullman读书使人完善

redshyinthemorning,shepherd'swarning早霞不出门，晚霞晴千里

remainfreshinone'smemory记忆犹新

renewfriendship共叙旧谊

ripoff宰客

riskone'sfortuneinbusiness下海

romewasnotbuiltinaday冰冻三尺，非一日之寒,大器晚成

romewasnotbuiltinaday罗马不是一天造成的

condtonone首屈一指

eingisbelieving百闻不如一见,眼见为实

ekingincreasingperfection精益求精

lf-praiisnorecommendation自吹自擂并非推荐之道

rveasabridge牵线搭桥

shortinweight缺斤短两

sillychildissoontaught要想孩子好，教育要趁早

single-hearteddevotion专心致志

sixofoneandhalfadozenoftheother半斤八两

somanycountries,somanycustoms各地各乡风

soonerorlater,thetruthcomestolight真相迟早会大白

sparetherodandspoilthechild不打不成器

spendmoneylikewater花钱大手大脚

spick-and-span焕然一新

streetgossip街谈巷议

striketheironwhileitishotstrikewhiletheironishot打铁趁热

strikewhiletheironishot趁热打铁

stuffandnonr乱七八糟

talkofthedevilandhe'ssuretoappear说曹操，曹操就到

tapnewsourcesofrevenueandhusbandexistingresources开源节流

tastesdiffer羊羹虽美，众口难调

thebestfishswimnearthebottom好戏在後头,好酒沈瓮底),好鱼居水底

theburntchilddreadstheworm一朝被蛇咬，十年怕井绳

thechildisfatherof(,to)theman３岁订到老

theearlybirdgets(,catches)theworm捷足先登

theendjustifiesthemeans为达目的不择手段

thefirststepisasgoodashalfover第一步是最关键的一步

thefirststepisthehardest万事开头难

thefistblowishalfthebattle先下手为强

thegiftitlfmaybesmall,butthegoodwillisdeep礼轻情意重

thegovernmentfunctionswellandthepeopleliveinharmony政通人和

thegrassisgreenerontheothersideofthehill这山望着那山高

thegreaterthetruth,thegreaterthelibel真理越明，诽谤越凶

theleopardcannotchangeitsspots江山易改，本性难移,狗改不了吃屎

thelongestdaymusthaveanend天网恢恢，疏而不漏

themilesofgodgrindslowly人心节节高於天，越是有钱越爱钱

themoreyouhave,themoreyouwant人心节节高于天，越富越爱钱

thetailormakestheman人要衣装，佛要金装

theudkeyisalwaysbright常用的钥匙常光亮

thereisnosmokewithoutfire无风不起浪

thick-kinned厚脸皮

thinkcarefullybeforeleaping三思而後行

thisisbeyonddispute毫无疑问

timeandtidewait(s)fornoman时间不等人,岁月不饶人

timeandtidewaitfornoman岁月不饶人

timefliesnevertoberecalled光阴一去不复返

timeismoney时间就是金钱,一寸光阴一寸金

timeisthefatheroftruth时间是真理之父

timetriesallthings时间考验一切

timetriestruth时间检验真理

titfortat一报还一报

toaddfueltotheflame火上加油

toandfro来来往往

tobeputontheshelf束之高阁

tobeshatteredtopieces落花流水

tobeattheair捕风捉影

tocomeoutinone'struecolours显出真面目

tocryone'sheartout伤心欲绝

todillydally吊儿朗当

toeatone'sheartout忧伤过度

toendinasmojke终成泡影

tofishintheair水底捞月

tohangbyathread千钧一发

tohaveone'sheartinone'smouth吓了一跳

tohaveone'sheartintherightplace好心好意

tohaveone'sheartinthewrongplace心怀叵测

tolearnbyheart铭记于心

toletbygonesbebygones既往不咎

tolockthestabledoorafterthehorisstolen亡羊补牢

tolookforaneedleinahaystack海底捞针

toloheart意气沮丧

topickandchoo挑来挑去

topluckupone'sheart鼓起勇气

toputallcardsonthetable打开天窗说亮话

toputthecartbeforethehor本末倒置

toekcommongroundwhilerervingdifferences求同存异

toshowone'struecolours原形毕露

tositinthorns如坐针毡

totakeheart振作精神

tomit逆来顺受

toomuchwaterdrownedthemiller过多反而有害

troublesbakeathome后顾之忧

trueprairootsandspreads赞词真实才能生根和传播

truthandroshavethornsaboutthem真相和玫瑰，身旁都有刺

truthisthedaughteroftime真理是时间的女儿

truthneedsnocolor真理不需用花言巧语装饰

truthwillprevail真理必胜

truth'sbestornamentisnakedness不加掩饰乃是真理的最好装饰

trytohelptheshootsgrowbypulling拔苗助长

twistsandturns迂回曲折

twocanplaythegame孤掌难鸣

twoheadsarebetterthanone三个臭皮匠，胜过一个诸葛亮

twoiscompany，butthreeisnone两个和尚抬水吃，三个和尚无水吃

wallofbronzl铜墙铁壁

wallshaveears隔墙有耳

warm-hearted热情的

wellbegunishalfdone好的开端是成功的一半

wheninromedoastheromansdo入乡随俗

wherethereisawill,thereisaway有志者事竟成

whilethereisalife,thereishope留得青山在，那怕没柴烧

whoknowsmostsaysleast懂的最多的人，说的最少

withgreatea轻而易举

withinastone'sthrow一箭之遥

womenhavelongtongues妇人单行

workwhileyouwork,playwhileyouplay工作的时候工作，玩的时候玩

youreapwhatyousow要怎么收获，先怎么栽

you'dbetterplaythemanalittlemore你应该多一点男子汉气概

weneverknowtheworthofwatertillthewellisdry井干方知水珍贵

whoretreatsfiftypacesmocksonewhoretreatsahundred五十步笑一百步。

whatislostinthehundredwillbefoundintheshire乡里丢失，郡里可得

onegoodheadisbetterthanahundredstronghands强手百双，莫如智者一人

nothingistoodifficultifyouputyourheartintoit世上无难事只怕有心人

onemanisworthahundredandahundredisnotworthone一人可抵一百，一百不抵一人

tabeggaronhorbackandhe'llridetothedevil叫花子发财忘乎所以然

oncethetreefalls,themonkeysonitwillfleehelter-skelter树倒猢狲散

youmaytakeahortothewater,butyoucannotmakehimdrink带马到和边容易，逼马饮水难