The weather is a constant topic of conversation in Alaska.

天气在阿拉斯加是一个永恒的交谈话题。

《柯林斯英汉双解大词典》

You interpret this as a sign—a polite one—that he is interested in you as a person rather than just in the topic of conversation.

你把这理解为一个信号，而且是一个礼貌的信号，说明他对你这个人感兴趣，而不只是对谈话的话题感兴趣。

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She cast around desperately for a safe topic of conversation.

她绞尽脑汁寻找稳妥的话题。

《牛津词典》

and she comes to a very touchy, a very delicate topic of conversation and she perhaps hesitates.

当她谈论到一个有点敏感与微妙的话题时，她似乎有点犹豫要不要接着讲下去。

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In the application for permission submitted to the County of Lambton council, it was stated that the process would see the work "elevated to myth status", creating a topic of conversation and strengthening community as a consequence, the idea being that people would share the mystery of their city.

BBC: Why make art no-one can see?

Researchers from Warwick University, writing in the British Journal of Psychology, said that dogs gave people a safe topic of conversation with which to break the ice with a stranger.

BBC: Dogs help you make friends

"I had to shake my head a couple of times because I really didn't know that was a topic of conversation, " said Matheny, 42.

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