那些因为某些需要得带手机的学生必须取得父母和老师的同意，并且必须在上课期间上交手机。

Those who require their phones for some need must get their parents' and teachers' approval and must hand their phones over during class time.

youdao

你必须取得平衡。

You must have balance.

youdao

你必须取得主教的同意才行。

You have to do that in an agreement the bishop.

youdao

They're controversial, I think for obvious reasons, because you have to sacrifice an embryo in order to get them.

这些研究极富争议,我想原因很明显,因为你必须牺牲一个胚胎来取得干细胞

耶鲁公开课 - 生物医学工程探索课程节选

Now, to do well in the course, you have to attend both the lectures and do the readings.

要想在这门课中取得好成绩,必须要认真听讲,用心阅读指定书目

耶鲁公开课 - 心理学导论课程节选