書面表達用英語怎麼表達？

This expression is used mainly in speech, not in writing.

這種表達主要用於口語，而不是書面語。

The course teaches students to avoid ambiguity and obscurity of expression.

這門課程教學生避免表達上的模稜兩可、含混不清。

Try to put a little more expression into it!

儘量注入更多的感情！

Freedom of expression is a basic human right.

言論自由是基本的人權。

The expression in her eyes told me something was wrong.

她的眼神告訴我出事了。