重点讲解:
1. kinds of 各种各样的;不同种类;
Many kinds of animals have vanished from the earth.
许多动物已从地球上消失了 。
2. try to 设法;试图;
Don't try to deceive me.
你别诳我 。
3. be unable to 不会;不能做某事;
She seemed to be unable to rouse herself to do anything.
她似乎打不起精神去做任何事情 。
4. have to 不得不;必须;
We have to resolve this matter once and for all.
我们必须彻底解决这一问题 。