重点讲解：
1. keep on 重复；继续；
例句：A business must stay in the black to keep on.
一个公司必须盈利才能维持%dsE0;_g*nrd。
2. shut up （使）住口；（使）闭嘴；
例句：She gave me a gentle nudge in the ribs to tell me to shut up.
她用肘轻轻捅了一下我肋骨让我住口^AM)9;#7pQ。
3. tend to do sth. 往往会；经常就；
例句：Most old people tend to cling to old ideas.
多数老年人常常墨守成规4k%ufa-&g0j0OQ。
4. in general 总的来说；总体上来看；大体上；
例句：In general her work has been good,but this essay is dreadful.
总的说来，她的作品不错，不过这篇文章糟透了Znli8k=VkK=@(O^cEx。
5. by the way 顺便地；附带说一句；
例句：Oh, by the way, there is a telephone message for you.
噢，对了，有你一个电话口信4nB6#CTD]B|YJ6@ZwY。