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1·The main topic of conversation was Tom's new girlfriend.

交谈的主要话题是汤姆的新女友。《牛津词典》

2·The debate veered away from the main topic of discussion.

争论脱离了讨论的主题。《牛津词典》

3·The main topic of conversation was the likely outcome of the election.

谈话的主题是选举可能产生的结果。《牛津词典》

4·What's the main topic today?

今天的主要议题是什么？

5·These two problems was the main topic in the meeting.

这两个问题在会议上占了首要地位。

6·That is the main topic of what we have to say about DE Man today.

这是我们今天要说的关于德曼的主要话题。

7·The main topic of furniture in the leisure chair design study.

本课题主要是对家具中的休闲椅进行设计研究。

8·The main topic of this paper is about steel pipe strapping machine.

本论文主要是围绕钢管打捆机研制开发进行的。

9·The main topic and background of this thesis are also given at last.

本课题的项目背景及主要工作。

10·In modern Chinese novels, childhood memory is one of the main topic forms.

在中国现代小说中，童年的回忆是一个主要的主题形态。