The military aid always has to be within a certant disatance of the president in case of emergency.

军事助理经常需要,待在总统的一定范围内,以防出现紧急情况。

普林斯顿公开课 - 国际座谈会课程节选

Okay, so you could see difficulties in estimating on both sides of the norm. Yes?

所以你们可以看到在一定范围内,做估算有多困难

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Our bodies have mechanisms like that, that mainly use the principle of negative feedback in order to control the parameters that are important for life within a certain range.

我们的身体有着与之类似的机制,主要依靠负反馈原理来,将与生命息息相关的指标控制在一定范围

耶鲁公开课 - 生物医学工程探索课程节选

It's going to let j run over the length of the list all right, so it's going to start at some point to move down, and then it's going to let i run over range, that's just one smaller, and what's it doing there?

就在这里，会做什么呢？,我们让j遍历这个列表,好的，它要从某一定开始移动,然后让i也跑遍整个范围，就是比之要小一，会发生什么？

麻省理工公开课 - 计算机科学及编程导论课程节选