重点讲解：
1. 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GQ[EZ(]mFV(GD。
2. at the same time 同时；
例句：It was a very strange feeling in retrospect — I was frightened, but excited at the same time.
回想起来那是一种非常奇怪的感觉——我当时既害怕又兴奋VnQeNpA0#W。
3. all over 到处；遍及；
例句：We have friends all over the world.
我们的朋友遍天下4P7JOETdX9#Lm~。
4. check out 了解清楚；核实；查实；
例句：Maybe we ought to go down to the library and check it out.
或许我们应该去趟图书馆，查个明白(^;XGPbOgZ。