UNIT 4 Astronomy: the science of the stars
Words
solar system planet circle astronomy origin religion 动力源泉
widely theory univer atoms billion dust solid
globe violent explode carbon vapor nitrogen
produce atmosphere appear surface unlike obvious
fundamental prence dissolve harmful acids chain
reaction extremely multiplied oxygen encourage development shellfish inct amphibians reptiles huge dinosaurs
exist ri mammal spread thus dioxide remove
puzzle prence chemistry planet gravity evidence
satellite violent shocked gentle rude biology prove
discovery physicist supply decrea species extinct
climate concern disappear spaceship force escape
pull lesn float weight painful frightening
夸别人优秀的话
amazed increa exhausting structure theory situation
crash
Phras:
in all directions combine to ttle into in time cool down
with as well as lay eggs remain a mystery give birth to
in one’s turn from as a result of depend on no longer
die out block out crash into dozens of fall back to
cheer up twice as far as fall over now that get the hang of
step forward break out pay attention to watch out be make up of
be fundamental to begin with in all directions according to
watch out for 密切注意；当心；提防
Grammar:沿海水域
1.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust ttled into a solid. (随后）它变成什么没人知道，知道38~45亿年前，这团尘埃才慢慢地形成一个固体的球状物。
be to do
1)“将要做某事”指预先安排好的计划或约定
2)表示义务、命令、禁止或可能性等，意思接近于should,must,have to
3)表示将来必然要发生的事，意为“注定......”
(2010全国高考)The discovery of gold in Australia led thousands to believe that a fortune_________
A.is made B.would make C.was to be made D.had made
2. The earth become so violent that it was not clear whether the shape would last or not. 地球变得激烈动荡，不知道这个固体形状是否会继续存在下去。
句法分析：本句是So...句型，that引导的结果状语从句中又包含一个主语从句，其中it是形式主语，whether the shape would last or not 是真正的主语。
violent:adj.暴力的；强暴的；猛烈的；激烈的
拓展：
a violent crime / behavior 暴力犯罪/行为
a violent storm 暴风骤雨
do 对....施暴；歪曲（事实）
take ....by violence 抢夺
with violence 强烈地，强有力地；用暴力
3.They were in time to produce carbon dioxide, nitrogen,water vapor and other gas,which were to make the earth’s atmosphere.最终产生二氧化碳、氮气、水蒸气及其他气体，从而形成了地球的大气层。
句法分析：which 引导非限制性定语从句，先行词为carbon dioxide,nitrogen,water vapor and other gas.
文房四宝指什么in time
1) 终于；迟早；最后
2) 及时，来得及（用作此意是，in time后常跟for sth 或to do sth.)
拓展：
at no time 任何时间都不 at a time 每次，一次
at one time曾经，一度 at the sane time 同时，然而
拜年的图片at times有时，时常（=sometimes=for time to time)
in no time立刻 ahead of time提前
all the time 一直，始终 on time按时，准时
for the time being 暂时 once upon a time从前
take one，time从容进行 kill time消磨时间
(2013陕西高考)The manager wants to e changes in the company,and I am sure he will ______________.
A.in particular B.in turn C.in change D.in time
海难(2012江苏高考)---Thank God you’re safe! -----I stepped back,just ___________to avoid
the racing car.
4. It was not immediately obvious that water was to 怎么留胡子be fundamental to the development of life. 水对生命的发展起关键作用，这一点在当时并不明显。
be fundamental to 对...必不可少/至关重要 fundamental adj.基本的，基础的
be similar to 及...相似少数民族骨干计划
be harmful to对...有害
be important to 对...来说是重要的
翻译：
有些专家认为，阅读是学校教育所依赖的基本技能。(2015安徽高考)
5. What many scientist believe is that the continued prence of water allowed the earth to dissolve harmful gas and acids into the oceans and as.很多科学家相信；地球上长期有水存在，使地球得以把有害气体及酸性物质溶解在海洋里。
be 对...有害（=do harm to）
harmless adj.无害的 be harmless to 对...无害
harmful adj.有害的 be harmful to 对...有害
harm n.伤害，损害 do harm to sb=do sb harm 对某人有害
学法点播：有些单词其词性的变化形式及harm类似，如：care→careful（小心的）→careless（粗心的）→carelessness（n粗心）
