But in that way I know you are closing " So if you're freshman write "one", " if you're sophomore, write down "two".

这样标记只是为了方便记住你,如果是大一新生，写上“一，大二的话，写上“二。

麻省理工公开课 - 电影哲学课程节选

if you're at X, let's just call you Mr. X, just to make it clear, so Mr. X is the person at position X.

如果你在X,就叫X先生,只是为了方便区分,所以X先生在X位置上

耶鲁公开课 - 博弈论课程节选