If you want to make sure both conditions are true and they both have to be true for any code to be executed, use ampersand ampersand.

如果你想保证两个条件都成立,或者它们两个都必须为真值，才能执行一些代码，那就使用“&&“

哈佛公开课 - 计算机科学课程节选

You want to use "make sure" to declare that you want something to declare that something needs to be done.

当你声称想要某东西，或表示某事必须做到的时候，可以使用“make sure”句型。

Make sure 课堂 - SpeakingMax英语口语达人

So it`s sort of a key issue for children and for adults actually to make sure that When we use a software that has more than one language it has to be completely in each language.

所以无论对成人还是儿童来说,这都是关键问题,当我们使用一款宣称拥有多语种的软件时,必须确保它的每一种语言都是完整的。

麻省理工公开课 - 媒体、教育、市场课程节选

When you use "You look", you want to be sure it's with someone who you're close to,

使用“You look”，一般是用在与你很亲密的人身上，

You look 课堂 - SpeakingMax英语口语达人