重点讲解：
1. pay off
成功；赢利；
eg. They doubted whether all this work would pay off.
他们怀疑这样干是否划得来。
eg. The effort is starting to pay off.
这一努力正在见效。
2. consider sb./sth. to be
认为；看待；
eg. They consider him to be nothing but an imposter.
他们认为他不过是个骗子而已。
eg. I consider him to be a clever fellow.
我认为他是个聪明的小伙子。
3. a great deal of
大量的；许多；
eg. The relationship caused her a great deal of heartache.
这段恋情使她非常伤心。
eg. This race gave everybody a great deal of pleasure.
这次比赛给大家以许多乐趣。