重点讲解：
1. be able to do sth. 可以…的，能够…的；
例句：I've never been able to work her out.
我一向无法了解她。
2. result from 由…产生；由…引起；
例句：Many hair problems result from what you eat.
很多头发问题都是由饮食引起的。
3. as well as 除…之外；也；还；
例句：She is skilled in defense as well as attack.
她具备进攻和防守技术。
4. from time to time 不时地；间或；偶尔；
例句：We go to the bar from time to time.
我们有时去酒吧坐坐。
5. be forced to do sth. 迫使；使必须；
例句：He was forced to dispose of his art treasures.
他被迫处理掉自己的艺术珍品。
