Unit 4 Astronomy:the science of the stars

1. The earth became so violent that it was not clear whether the shape would last or not.(Page 25)

地球(开始)变得激烈动荡,不知道这个固体形状是否会继续存在下去。

★violent adj.猛烈的;激烈的;强暴的

2.Water had also appeared on other planets like Mars but,unlike the earth,it had disappeared later.(Page 26)

像火星一样其他行星上也曾出现了水,但和地球不同的是,这些水后来都消失了。

★unlike prep.不像;不同

句型一:It is unlikely that...不可能……

句型二:It's very unlike sb.to do sth.做某事实在不像某人平时的作风。

3. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.(Page 26)

很多科学家相信,由于地球上长期有水存在,使地球得以把有害气体和酸性物质溶解在海洋里。

★harmful adj. 有害的

4.They laid eggs too and existed on the earth for more than 140 million years.(Page 26)

它们也生蛋而且在地球上生存了一亿四千多万年。

★exist vi. 存在;生存

句型:There exists/existed...某地有…

5. These animals were different from all life forms in the past,because they gave birth to young baby animals and produced milk to feed them.(Page 26)

哺乳动物不同于以往所有的生命形态,因为它们生出幼仔,用自己的母乳喂养。

★give birth to 产生;分娩

6.

As a result of this event,a great dust cloud formed in the sky blocking out the sunlight.(Page 29)

正因为这一事件,天空中形成了一团巨大的尘云,挡住了阳光。

★block out挡住,遮住(光线和声音);忘掉,抹去(不愉快的事)

7. I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.(Page 31)

我立刻感到很高兴,由于失重我在太空舱里飘来飘去,我望着(身后的)地球越来越小,而(前方的)月球越来越大。

★cheer up 感到高兴;感到振奋

8."Oh,dear,"I cried,"walking does need a bit of practice now that gravity has changed."(Page 31)

"天哪,"我大声说,"重力改变了,看来走路也的确需要练一练了。"

★now that 既然

9.We watched,amazed as fire broke out on the outside of the spaceship as the earth's gravity increased.(Page 31)

我们惊奇地看着,随着地球引力的增加,宇宙飞船的外层燃烧起火。

★break out 突发;爆发

10. Watch out for...(Page 31)

当心……

★watch out 密切注视;当心;提防

 

 

 

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