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

你可以用“make sure”来声明想要某东西或某事必须做到。

youdao

I declare that the Library is endless.

我认为，这座图书馆是无穷无尽的。

youdao

I don't declare that life is a journey.

我并没有宣称生命是一场旅行。

youdao

He also proposed that Congress declare that it had no power to interfere with the slave trade between states.

VOA: special.2009.03.19

Three: they declare that language is always mediated, always mediating, that your experience of people is never clear of some set of meanings that someone else has assigned to it.

他们声称语言一直被调停，也一直在调停，凭借你们对人们的认识，永远无法弄清,其他人赋予的意义。

耶鲁公开课 - 1945年后的美国小说课程节选

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

You try to save face and openly declare that a lost account was too small, anyway?

FORBES: Grace Under Fire

BP, were quick to declare that they still had faith in the Russian government.

ECONOMIST: Russia

Free of the Parris Island terrors, I will declare that what Fisher prescribes is similarly preposterous.

FORBES: George Gilder Is On A Ken Fisher Kick