毕竟这是你们系列讲座的主题。

Because that is after all the topic of your lecture series.

youdao

需求扩大到教堂社区，他们要求牧师减少布道所用的时间以便提供关于家庭急救等主题的讲座。

Demand has spread to church communities, who have asked their pastor to reduce the time spent preaching to provide talks on such topics as first aid in the home.

youdao

而这次系列讲座的主题，很切合我们普林斯顿大学非正式的校训，为国家服务，为世界服务。

And the sort of theme of this seminar series is very much like Princeton informal motto, which is "Princeton in the nation's service and the service of all nations".

youdao

That's why I always say my lecture is on love, the definition of terms is about love, but the experiments really are much more about attraction than about love.

这就是为什么我的讲座主题是爱，是关于爱的定义，但是真正地，这些实验,更多的是关于吸引，而不是爱。

耶鲁公开课 - 心理学导论课程节选

So the theme of the class today is babies.

今天讲座的主题是婴儿。

哈佛公开课 - 幸福课课程节选