重点讲解：
1. by oneself 自行；单独；
例句：Clive disappeared into a room by himself.
克莱夫独自一人进了屋r8HLJ@i%3VT&y3B8kl_。
2. go out 外出交际；外出娱乐；
例句：It will be a marvellous occasion and they should go out and enjoy it.
这是个好时机，他们应该出去痛快地玩一玩j&;~#n1cYZ1。
3. over and over again 一再；再三；反复；
例句：This is what she has been saying over and over again--I don't know how many times.
这种话，她翻来覆去不知说过多少遍了&IRwq)gtK)。
4. fair enough (说法、决定或行为)有些道理，说得过去；
例句：Fair enough, I think that's a very reasonable price.
有道理，我认为那是非常公道的价格._S7c-.qd^o+。