教授将在讲座中谈论气候变化。

The professor will ___talk about climate change in his lecture.

她将在作者活动中谈论她的新书。

She will ___talk about her new book at the author event.

他被邀请在会议上就数字营销策略进行讲座。

He is invited to ___talk on digital marketing strategies at the conference.