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1、学海无涯 Unit 4 1 according to 根据 依据 而定 1 to begin with 以 开始 2 in time to do 及时做某事 3 cool down 冷却下来 4 be fundamental to 对 很重要 5 allow sb to do sth allow doing sth 允许某人 做某事 允许某事 6 be harmful to sb sth 对某人 某事有害 7 dissolve sth into sth 把 溶解在 之中 8 a chain reaction 连锁反应 9 fill sth with sth 用 填充 10 as well as
2、 除了 之外 也 11 for the first time 第一次 12 lay eggs 下蛋 13 give birth to 分娩 14 in one s turn 轮到某人 接着 15 prevent from 阻止 制止 16 as a result 结果 17 depend on 依赖 依靠 18 fall from a tree to the ground 从树上摔下到地 上 19 be far from 远远不 一点也不 20 cheer up 感到高兴 感到振奋 21 now that 既然 22 after a while 一会之后 23 get the hang of
3、sth 掌握 理解 24 break out 疾病 战争 火灾 爆发 突发 25 Please check that 请核实 请检查 26 Watch out for 小心 27 hang out 闲逛 连晒衣服 28 give out 分发 发出 光 热 29 warn sb of about sth 提醒某人某事 remind sb of sth 30 warn sb not to do 警告某人 不 去做某事 31 a new approach to solving the problem a new way to solve the problem 一个解决这个问题 的新方法 32 f
4、eed A on B 用 B 喂 A 33 go out 灯 火 熄灭 put sth out 熄灭 34 go dry 变得干燥 35 There is no escape 逃不掉了 have a narrow escape 幸免于难 36 According to a widely accepted theory the universe began with a Big Bang that threw matter in all directions 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 37 What it was to become
5、was uncertain untill the age of the dinosaurs 随后它会变成什么没人 能知道 直到到了恐龙时代 38 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 当地球冷却下来的时 候 水开始在它的表面形成了 39 It was not immediately obvious that water was to be fundamental to the development of life 水 对于
6、生命的发展会起关键作用 这一点在当 时并不明显 40 Why they suddenly disappeared still remains a mystery 它们为什么突然灭绝 至今仍是个 迷 41 They are putting too much carbon dioxide into the atmosphere which prevents heat from escaping from the earth into space 人类把大 量的二氧化碳排放到大气中去 这使得地球 上的热不能释放到太空中去 42 So whether life will continue on the
7、 earth for millions of years to come will depend on whether this problem can be solved 所以 生 命能否在未来的几百万年后在地球上延续取 决于这个问题能否被解决 43 No one knows exactly how the earth began as it happened so long ago 44 have a violent temper 45 watch a violent film 46 in theory 47 in practice 48 react to sth 49 multiply 2 by 3 50 therefore thus accordingly
