A mantra is something that you would just repeat over and over, for example, the syllable that everyone seems to be familiar with and popular one like Om, you can say Om over and over.

曼怛罗就是咒语,你一遍遍重复的内容，比如，大家都熟悉的音节,或唵这种众所周知的，你可以重复念唵音。

普林斯顿公开课 - 人性课程节选

And so your director makes you repeat the same phrase over and over and over.

所以你的导演让你一直重复那段话，一遍一遍又一遍。

I'm frustrated 课堂 - SpeakingMax英语口语达人

At times we have whole books that repeat or go over the same material.

有时候，有一整本书都在重复同样的内容。

耶鲁公开课 - 旧约导论课程节选

And that idea was, we make a guess in the middle, we test it so this is kind of a guess and check, and if the answer was too big, then we knew that we should be looking over here. If it was too small, we knew we should be looking over here, and then we would repeat.

这些有理数是有序排列的,然后我们的想法是,首先在中间取个数作为猜想数，然后对这个猜想数进行验证，如果由猜想数得到的答案太大,我们知道应该跳过，比猜想数大的那个区间，如果太小的话。

麻省理工公开课 - 计算机科学及编程导论课程节选