A poster said: "You will be traveling through Indian country and the safety of your person cannot by vouchsafed by anyone but God."

VOA: special.2010.04.26

Or in situations where you have concern for your safety or for other's safety.

或者当你在为自己或他人的安危感到担忧时，都可以使用这个句型。

I'm worried 课堂 - SpeakingMax英语口语达人

But I think this is rather an implausible suggestion because, of course, you could have these glorious views just by going up in the airplane and looking down from the safety of your airplane.

但我认为这是个似是而非的建议,因为，当然，你可能只是坐飞机向上飞,并安全地向下看,就会有这些迷人的视野。

耶鲁公开课 - 死亡课程节选

Make sure you fasten your safety belts.

一定要系好安全带。

Make sure 课堂 - SpeakingMax英语口语达人