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

For example, if it's more convenient should you change the environment to make the unhealthy food less convenient and make healthy foods more convenient?

举例来说,如果是因为方便,那你改变外部环境,会使得健康食品比垃圾食品更容易获得吗

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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