重点讲解：
1. by the way 顺便地；附带说一句；
例句：The name Latifah, by the way, means 'delicate'.
顺便说一句，Latifah 这个名字意思是“娇嫩”。
2. all set <美俚>准备就绪；
例句：Our plans for the trip are all set.
我们旅行的准备工作都做好了。
3. to begin with 最初；刚开始；
例句：It was great to begin with but now it's difficult.
一开始非常好，但现在可就难了。
4. hang around （在某处）等待，闲逛，闲呆着；
例句：Two suspicious-looking fellows were seen hanging around the campus last night.
昨夜有人看见两个形迹可疑的人在校园里徘徊。