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重点讲解：
1. do sb. good
对…有好处（或有帮助）；
eg. The outing will do me good.
这次远足对我会有所助益。
eg. It's probably done you good to get away for a few hours.
离开几小时或许对你有好处。
eg. You don't do anybody any good by getting yourself arrested.
你要是被抓了对谁都没有好处。
2. derive from
获得；取得；得到；
eg. Mr Ying is one of those happy people who derive pleasure from helping others.
英先生属于那种助人为乐的快活人。
eg. Mary has derived a lot of benefit from her tuition.
玛丽从她的教学中得到很大收益。
eg. We can derive great pleasure from our studies.
我们可以从读书研究中获得极大的乐趣。
v. 观察，遵守，注意到
v. 评论，庆
