But in fact, I have to go there, and when going there, I have to reconceive of not just where I was, what I was doing, but in part who I am.

而事实上，我必须前进，并且当我在前进中，我不仅必须重新审视，我在哪里，在干什么，还要审视我是谁。

普林斯顿公开课 - 人性课程节选

But you have to submit your test scores, you have to write some essays, like why you want to go to Brown.

但是你必须提交你的成绩单，还要写一些文章，例如你为什么选择布朗大学。

被学问的自由所迷住 - SpeakingMax英语口语达人

A vaccination, for it to work around the world, has to be inexpensive, transportable, possible to use without advanced medical personnel, and those kinds of things.

而疫苗接种,为了能适用于全世界,它必须便宜,便于运输,还要能在没有高级医生的情况下使用,它应该具有诸如此类的特点

耶鲁公开课 - 生物医学工程探索课程节选

We have to put the audio visual up.

必须要听，还要看。

麻省理工公开课 - 固态化学导论课程节选

So it has to have that. Typically it's nice if it can have useful intermediate results.

否则为什么还要那么麻烦去运行它呢？,因此实验必须有这个可能。

麻省理工公开课 - 计算机科学及编程导论课程节选