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1·How to write an expository essay?

怎样写一篇说明文？

2·Write an expository essay explaining how to republishing fast.

写一篇有关如何快速阅读的说明文。

3·In a short expository essay of about 600 words, the average paragraph may be about 100 words, or between four and eight sentences.

在一篇仅有六百字的议论短文里，一个段落可能不超过百字，或在四至八句之间。