戒烟，如果不可能的话，确保你所爱的人远离三手烟。

Give up smoking, or if that is not possible, make sure that your loved ones are far away from third-hand smoke.

youdao

如果不可能的话，给专门医治猫狗的地方打电话。

If that's not possible, call a poison hotline that specializes in cats and dogs.

youdao

如果不可能实现持续一致性，那么我们就不必负责任。

If it's impossible to be consistent, then we really don't have to take responsibility.

youdao

Things can't become holy and can't come into contact with the holy or the sacred if they are not first pure.

事物不可能变得神圣或是与神圣有联系,如果它们连纯洁都算不上。

耶鲁公开课 - 旧约导论课程节选

But, you know, any professor who stands before you should say the same thing about his or her subject. If they don't believe that, they shouldn't be teaching.

但是，你知道，所有站在你们面前的老师,可能都会这样介绍他的课程,如果他们不那样相信着，那他们就不应该教那门课了。

麻省理工公开课 - 固态化学导论课程节选

If you don't do that, there's a danger you will learn something you don't have to, and we don't want that.

但是如果你不来,你就有可能学到一些不重要的知识,我们当然不希望这样

耶鲁公开课 - 基础物理课程节选