Unit7 SectionB 教材知识详解
1. This elephant weighs many times more than this panda.这头大象的重量是这只熊猫的很多倍。
many times 很多倍，time做可数名词常用来表示倍数，意思是“……倍”，常用的结构是：数词+times+比较级+than +比较的对象，意思是“比……多/大多少倍”。或数词+times +as…as+比较级的内容。意思是“是……的多少倍”。如：
His school is two times as big as my school.他的学校是我的学校的两倍。
2. At birth, a baby panda is about 0.1 to 0.2 kilos.
刚出生的小熊猫幼崽约0.1到0.2公斤。
at birth 出生时（用作时间状语）。give birth ( to sb/ sth) 生孩子；产仔。
如：At birth, a baby panda is about 20cm long.出生时，小熊猫幼崽大约20厘米长。
3. A panda can live up to 20 to 30 years.
一只熊猫活20年到30年。
up to 高达；up to +数量词 达到（某数量、程度等）；至多。be up to sb. “由某人决定”。 如：I often sleep up to nine hours a night.我一个晚上经常睡九个小时。
如：— Shall we go out or stay in? 我们出去还是待在家里？
— It’s up to you.由你决定。
4. Panda keepers are preparing milk for the baby pandas’ breakfast.
熊猫饲养员们正在给熊猫幼崽准备牛奶作为早餐。
prepare…for… 为……准备……。
①prepare sth.表示“准备......”，后接名词或代词作宾语。
如：Our English teacher was preparing the lessons when I came into the office.
我进办公室时，我们的英语老师在备课。
②prepare to do sth.表示“准备做……”。
如：They were preparing to cross the river when it began to rain.
他们正准备过河，突然下雨了。
③ prepare for sth.表示“为......做准备”。
如：The students are busy preparing for the final exam.学生们正在准备期末考试。
5. The babies often die from illness and do not live very long.
熊猫幼崽常死于疾病，并且活不久。
(1) die from + 外因 “死于……”，主要指事故等方面的外部原因。
如：die from a traffic accident 死于交通事故
The old man died from a car accident last year.
这个老人去年死于一场车祸。
(2) die of + 内因 “死于……”，主要指死于疾病、衰老、情感等自身原因。
如：die of hunger/an illness 饿/病死
(3) die out（家族、物种等）灭绝；绝迹。
如：Dinosaurs died out 65 million years ago. 恐龙在六千五百万年前灭绝了。
6. Adult pandas spend more than 12 hours a day eating about 10 kilos of bamboo.成年熊猫一天花费十二个小时吃掉十公斤的竹子。
spend/take/pay/take的区别主要从三个方面考虑，主语，花费的内容，及结构。spend人作主语，宾语是时间和金钱，结构是：sb.+spend(s)+时间/金钱+on+名词，sb.+spend(s)+时间/金钱+(in)v.-ing；pay 付款，人作主语，常用词组pay for；take花费，时间事物作主语，常用句式It+takes+sb+ some time+to do sth；cost物作主语，只能花费金钱。
如：He spent an hour doing his homework=He spent an hour on his homework= It took him an hour to do his homework. 做作业花费了他一个小时的时间。
He spent ten yuan on the book=He spent ten yuan buying the book=He paid ten yuan for the book=The book cost him ten yuan.他花费了十元买这本书。
7. ……, but then humans started to cut down the forests.
……，但是后来人类开始砍伐森林。
cut down 砍倒，减少，降低，缩短。
与cut有关的短语
cut sth. from sth. 切下，割下；cut sth. away 切除，剪去；cut up 切碎；cut off切断，停止。
8. Another interesting fact is…, 另一个有趣的事实是……
another +单数名词，再一个，另一个。another+数字+复数名词，相当于数字+more+名词复数。
如：I don’t like this pen. Plea show me another one.我不喜欢这只钢笔。请再让我看一支。
