因此，我要你注意检点自己，从此以后，步步当心。

So I want you to be on your guard and watch your step from now on.

youdao

我要你从现在起注意提高警惕，步步当心。

I want you to be on your guard and watch your step from now on.

youdao

我想要你们集中注意力看186行。

I want to draw your attention to line 186.

youdao

So it's a way of reminding you, I've got to be careful about the types of things that I put in.

因此我这是在提醒你，一定要对输入的东西的类型,多加注意。

麻省理工公开课 - 计算机科学及编程导论课程节选