She's absolutely certain she's going to make it in the world.

她确信自己将享誉全球。

《柯林斯英汉双解大词典》

I stayed long enough to make certain that the house was absolutely empty.

我呆得很久，以致能肯定那房子是空的。

youdao

But I am really certain that either team will do absolutely everything in their power to make sure they can remain at the top.

但我真的确信，两支车队都会全力确保他们能留在巅峰。

youdao

To make absolutely certain, the team used two different strains of parasite in different groups of mice.

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Further, to make absolutely certain that the grid cannot own any power stations.

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"I'm 90% there and my first priority for this year is to make absolutely certain of my place, " he said.

BBC: K CLUB DREAMING