如果有时间，我们经常去朋友家串门。

We often just drop by our friend's homes if we have time.

youdao

如果你有时间，中心本身也值得一看。

If you have time it's worth taking a look at the Centre itself.

youdao

下周六我打算邀请一些朋友参加聚会，你如果有时间，欢迎过来。

I'm having some people over to a party next Saturday. If you're free, you're more than welcome.

youdao

And then, if we have time at the end, we'll introduce one last topic, which is isoelectronic atoms and ions.

最后，如果有时间的话，我们将再介绍最后一个主题：,等电子原子与离子。

麻省理工公开课 - 化学原理课程节选

If you did know how much time you had left, ? how would you act differently from what you're doing now?

如果你确实知道了自己还剩多少时间，你会和你现在的行为有不同吗？

耶鲁公开课 - 死亡课程节选

Okay, if anybody has questions about this one in particular you can ask Christina after class or at a different time.

如果大家有问题想单独问她,可以在下课后或其他时间问她

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选