当谈论到商业，这就不是赚钱的问题了。

When it comes to business, it's not about making money.

youdao

当谈论到…的时候，人们的观点截然相反。

When it comes to..., people have diametrically opposite opinion.

youdao

当谈论到班级活动的时候，我会很兴奋，并且参加班级活动。

When comes to the class activity, I will be very excited and take part in the activity.

youdao

When you speak about Greeks you will be speaking about something more than merely the fact that they spoke a certain language.

当你谈论到希腊人的时候,你不仅仅说,他们只是讲一种特定语言的人群

耶鲁公开课 - 古希腊历史简介课程节选

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。

have to 课堂 - SpeakingMax英语口语达人

And as we add constructs to the language, we're going to talk about.

当我们开始加指令的时候，我们会谈论到这一点。

麻省理工公开课 - 计算机科学及编程导论课程节选