然而，一定要注意，并非所有英美军官都执行命令。

It must be noted, however, that not all British and American officers carried out orders.

《柯林斯英汉双解大词典》

一定要注意先看清合约再交钱。

Make sure you read the contract before parting with any money.

《牛津词典》

注意一定要让你的邮件改投到你的新住址。

Make sure you get your mail redirected to your new address.

《牛津词典》

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

Be careful.

一定要注意

耶鲁公开课 - 基础物理课程节选

Such men have no other rule, but that of force and violence," listen to this, "So may be treated as beasts of prey those dangerous and noxious creatures that will be sure to destroy to you " if you fall into their power", so kill them first.

这种人除强力和暴力的法则之外，没有其他法则“,注意这里，“因此可以被当作猛兽，危险和有害的动物看待,要落在它们的爪牙之内,就一定会遭到毁灭，所以先下手为强。

耶鲁公开课 - 公正课程节选