重点讲解：
1. enjoy oneself
感到愉快；过得高兴；
eg. I must say I am really enjoying myself at the moment.
我得说此刻我感到非常愉快。
eg. People drink to relax, unwind and enjoy themselves.
人们以喝酒来放松自己，轻轻松松地自我享受一下。
2. what's the matter/what's wrong
怎么了；出什么事了？
eg. You're looking blue.What's the matter?
你看起来挺忧愁，怎么回事？
eg. What's wrong? You haven't touched your food.
怎么了？你一口饭都没吃。
3. of course
（表示通常、显见或众所周知的事实）当然，自然；
eg. The only honest answer is, of course, yes.
唯一诚实的回答自然是“是”。
eg. Of course he would be ashamed to borrow often.
当然，常常向人借钱他自己也会惭愧的。
4. count down
倒数；
eg. The spaceship will soon be launched, the people at control have already begun to count down.
宇宙飞船很快就要发射了，控制室的人已经开始在倒数了。
eg. On New Year's Eve, many people gather together to count down for the coming year.
在除夕夜，很多人聚在一起为新年倒数。
5. hurry up
赶紧；赶快；
eg. We are pressed for time; we must hurry up.
我们时间紧迫，必须加紧。
eg. Let's hurry up so that we may finish the work in time.
咱们快一点，好及时完成任务。
