精品文档---下载后可任意编辑新人教版高中英语必修三 U4 课文重点句汇合1.The origin of life on earth is a question that interests astronomers.地球上生命的起源是使天文学家感兴趣的问题。(P25)2.However,according to a widely accepted theory,the universe began with a "big bang"that threw matter in all that,atoms began to form and combine to creat stars and other bodies.然而，一种普遍为人们所接受的理论是：宇宙起源于一次大爆炸，这次大爆炸将物质投射到四面八方。然后原始开始形成并结合成恒星和其他天体。3.What it was to become was uncertain until between and billion years ago when the dust settled into a solid globe. 。随后它会变成什么没人能知道，直到 45—38 亿年前，这团尘埃才慢慢地形成一个团体的球状物（凝聚成一个固体球体）。4.They were in time to produce carbon ， nitrogen, water vapour and other gases, which were to make the earth's atmosphere. 他们（烈火和岩石）最终产生了碳，氮气，水蒸气和其他多种气体，从而形成了地球的大气层。5.What is even more important is that as the earth cooled down, water began to appear on its surface. 更为重要的是，地球冷却了下来，地球的表面就开始出现了水。(P26)6.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.很多科学家信任，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。7.They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. 它们繁殖起来，就使得早期的海洋充满了氧气，这为早期的贝类以及其他各种鱼类的发育进一步制造了条件。11精品文档---下载后可任意编辑8.Why they suddenly disappeared still remains a mystery. 他们为什么会突然灭绝至今仍是个谜。9.So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 所以，...
