重点讲解：
1. be going to do sth.
想要做某事；决定做某事；
eg. I'm going to go to bed.
我要睡觉了。
eg. He announced that he's going to resign.
他宣布他即将辞职。
eg. I was not going to compromise.
我决不妥协。
2. amount of
总数；总额；
eg. He needs that amount of money to survive.
他需要那样一笔钱以生存下去。
eg. I still do a certain amount of work for them.
我仍然为他们做一些工作。
eg. An abnormal amount of snow fell here last week.
上周这里下了异常大的雪。
