重点讲解：
1. get on 上车；
例句：She got on the bus and picked a seat up front.
她上了公车，找了个最前面的座位。
2. get off 下车；
例句：The train pulled in and all the passengers got off.
火车进站了，所有的乘客都下了车。
3. a couple of 两个；几个；
例句：He can switch from being nice to nasty in a couple of seconds.
他可以在几秒钟内从一个很和蔼的人变成一个很讨厌的人。
4. all the way （强调距离）一路；
例句：The little girl was chattering gaily all the way.
那小女孩一路上兴高采烈地说个不停。
5. even though 即使；尽管；纵然；
例句：Even though I'm quite a reserved person, I like meeting people.
我虽然性格极为内敛，但喜欢和人接触。
