A topic sentence introduces the subject.

主题句介绍主题。

Each paragraph should have a topic sentence.

每个段落都应该有一个主题句。

Each paragraph should start with a topic sentence.

每个段落都应该以主题句开头。

The teacher asked us to write a paragraph with a topic sentence.

老师让我们写一个包含主题句的段落。

What is a topic sentence?

什么是主题句?

Teachers often called this a topic sentence.

老师们通常称这句话为：主旨句。

The paragraph should contain only one central idea. this can be stated in a topic sentence.

一个段落只能表达一个中心思想，往往在主题句中提及。