重点讲解：
1. on purpose 特意地；故意地；有意地；
例句：Was it an accident or did David do it on purpose?
是意外还是戴维故意所为？
2. at first 最初；起初；开始时；
例句：Dart, who had at first been very tense, at last relaxed.
起初，达特非常紧张，最后终于放松了下来a#zN-k)lCv9。
3. turn out 原来是；结果发现；
例句：It turned out that I knew the person who got shot.
结果发现我认识那个中枪的人F#-]hf1pF8E。
4. take away 拿走；夺走；
例句：Don't let him take away your freedom to think for yourself.
别让他夺去你独立思考的自由stNS1g!b.gZ-APf+1。