重点讲解：
1. sit down 就座；坐下；
例句：My head's in a whirl; I must sit down and think.
我的脑袋一片混乱，我得坐下好好想一想。
2. be destined to do sth. （命中）注定的；一定；
例句：He feels that he was destined to become a musician.
他觉得自己注定会成为一名音乐家。
3. be going to do sth. 将要，即将（发生）；
例句：I am assuming that the present situation is going to continue.
我认为目前的情况将会继续下去。
4. figure out 想出；理解；弄清；
例句：This is something I have to figure out myself.
这是我自己必须要弄清的事情。