So I should warn the people sitting at the back that my handwriting is pretty bad, that's one reason for moving forward.

提醒一下坐在后面的人,我的板书写得很糟,所以最好往前坐

耶鲁公开课 - 博弈论课程节选

I should also warn you that this code includes some Python concepts, at least one, that you have not yet seen.

我得事先说明这个代码中,包括了一些你没见过的Python语言的概念，至少一个。

麻省理工公开课 - 计算机科学及编程导论课程节选