教材原句

3."Oh dear，" I cried，"walking does need a bit of practice now that gravity has changed."

"天哪，" 我大声说， "既然重力改变了，看来走路也的确需要练一练了。"

分析解读

now that引导原因状语从句。

仿写运用

Now that/Since we have no money，we can't buy a new car.

既然没钱，我们没法买新车。

教材原句

4.We watched，amazed as fire broke out on the outside of the spaceship as the earth's gravity increased.

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。

分析解读

形容词作伴随状语，补充说明主语所处的状态。

仿写运用

After the long journey，the three of us went back home，hungry and tired.

长途旅行之后，我们三人回到了家，又饿又累。

重点词汇

1．Other scientists believe that a comet crashed into the earth long ago and caused the disappearance.

其他的科学家们认为很久以前一颗彗星撞到地球上，这导致了(恐龙的)消失。

crash vi.& vt.碰撞；坠落；破产；n.相撞事故；飞机的坠落；坠落声；撞击声

crash into...撞到......上；闯入

a plane/car crash飞机失事/汽车撞车事故

(1)More than twenty passengers were injured in the train crash.

20多名乘客在火车车祸中受伤了。

(2)Unfortunately，the car crashed into a big stone and burst into flames.

不幸的是，汽车撞在一块大石头上并燃烧起来。

2．As the rocket rose into the air，we were pushed back into our seats because we were trying to escape the pull of the earth's gravity.随着火箭的升空，由于我们在努力挣脱地球的引力，我们被向后推在座位上。