This article has discussed two major topics.

本文讨论了两个主要主题。

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This section should be organized according to major topics.

这一局部应依据主题来停止组织。

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The following contains the key points expressed by the panelists covering 5 major topics.

下面列出与会者所表达的一些主要观点，大体上涵盖了5个主题。

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I don't know what your major is; I don't know what you are going to do later so I picked the topics that all of us in physics find fascinating.

我不知道你们的专业是什么,我也不知道你们今后从事什么工作,因此,我会选择一些,物理学界公认的有趣的内容

耶鲁公开课 - 基础物理课程节选

Sometimes the story of the day can drive major topics right out of the news.

FORBES: Magazine Article

Each year, this Forum provides a welcome opportunity for constructive discussion of the major topics of the day.

UN: Secretary-General

More details of all major topics are available via the ITU website.

CNN: Opinion: ITU meeting 'no threat to free speech'