我们别再谈论节食这个话题行吗？

Please can we get off the subject of dieting?

《牛津词典》

他将谈话逐步引到钱这个话题上。

He nudged the conversation towards the subject of money.

《牛津词典》

我已相当详细地讨论过这个话题。

I have discussed this topic in some detail.

《柯林斯英汉双解大词典》

And the question is how does poverty fit into that question of life issues, with the prolife, with the death penalty.

问题是，贫困问题,是怎样和反堕胎，死刑等问题一同，被纳入生命这个话题中来的。

普林斯顿公开课 - 人性课程节选

We usually use this pattern when the question that you're asking about relates directly to the person you're speaking with.

当你在询问与谈话对方直接有关的话题时，你可以使用这个句型。

Do you 课堂 - SpeakingMax英语口语达人

Right, having done that, we can certainly get to more complicated things, so for example, suppose I look at that expression.

好，说完了这一点，我们就可以讲些复杂些的话题了，例如，假设我看到了这个表达式。

麻省理工公开课 - 计算机科学及编程导论课程节选