Because it's hard when you go back being part of any group. Once you are in that group, and away from other people, it's very hard to remember We've talked that -Oh, have you?

因为如果你回到原来的群体中,就会变得难了，因为你只要一呆在那个群体中，远离其他人，就很难,我们聊过这个，-是吗？

普林斯顿公开课 - 人性课程节选

if you talk to the professors you're interested in working for in advance,

如果你提前跟你在工作中感兴趣的教授聊一聊，

要考入大学 - SpeakingMax英语口语达人