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。

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The central theme is usually summarized in what is called the topic sentence.

中心议题通常被概括地称为主题句。

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Be sure each paragraph has a central idea, and that each sentence has a subject and verb.

每个段落要有中心主旨，每句话要有主词、动词。

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Assistant U.S. Attorney Andrew Kogan indicated during the federal hearing in Newark that the government planned to make the fight central to its push for a tough sentence, arguing it showed the defendants remain likely to commit violence.

WSJ: Judge: NJ terror case sentencing will take days

More serious crimes requiring a more severe sentence will still be tried in the borough's central criminal court.

ECONOMIST: Dispensing justice