But they must be careful not to get too close.

VOA: special.2009.04.15

How close they will get remains to be seen.

至于以后关系如何还是个未知数。

普林斯顿公开课 - 国际座谈会课程节选

So you get to be pretty close with people, and

所以关系比较亲密，然后

跟校友们的关系 - SpeakingMax英语口语达人

So, this should be pretty straight forward, 100% let's see if we can get close to a 100% on this one, which is how many radial nodes does a 4 p orbital have?

很简单,让我们来看看这题，我们是不是可以接近%,对于一个4p轨道，它有多少个节点？,给你们10秒钟？

麻省理工公开课 - 化学原理课程节选