这种培训可以使非正式的，但必须要通过某种形式来开展。

This training can be informal, but it does need to take place in some form.

youdao

所以我想说的是，你可以通过赐予而被爱，但必须要有评价。

So what I'm saying is that you can be loved through bestowal, but there has to be some appraisal.

youdao

美国并不肩负着维护亚洲的力量平衡的整个重担，但必须要起带头作用。

Washington does not have to shoulder the entire burden of preserving the Asian power balance, but it must lead.

youdao

But once you start publishing things in between covers, you actually have to decide what goes in and what goes out.

但一旦你开始把书籍加上封面出版，你就必须决定要出版哪些书。

耶鲁公开课 - 新约课程节选

But Aristotle used to think that if you want something to move, there has to be some agency making it move.

但亚里士多德认为,如果要让物体运动,那就必须有某种作用让它运动

耶鲁公开课 - 基础物理课程节选

But I need to point out that there's another disadvantage that the fission case raises for the soul theory.

但我必须要指出，灵魂理论的裂变案例,其实还有一个缺点。

耶鲁公开课 - 死亡课程节选