If you see words such as these that denote something as certain and absolute, make sure that they are indeed, certain.

如果你看到这样的字词表示一些事情是确定的和绝对的，要确认他们是真实的。

youdao

I'm not sure if you want to take your best friends and your entire world doing certain business together because there are so many risks if it doesn't work out.

我不确定你是否愿意拉着你最好的朋友，一起打拼事业，因为这会有很高的失败风险。

youdao

It may be illegal to copy certain materials without permission or license, including documents, images, and currency. If you are not sure whether you have permission, seek legal advice.

未经许可或授权地复制某些物品可能是非法的，包括文档、图像、以及货币等。如果您不确认是否获得了许可，请寻求法律咨询。

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Even if you are careful about your Facebook privacy settings and you make sure only certain colleagues see your posts, Facebook postings are not as effective as in-person meetings about the problem at hand, says Golden.

FORBES: When Is It OK To Diss Your Boss Online?

How are you going to give us that confidence and make sure that we're certain about both the near-term and long-term growth prospects?

WHITEHOUSE: President Obama Closes Forum on Jobs and Economic Growth