You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.

你们记得他们在树林中游荡,没有拿他们采摘的果子，小哥哥，也就是二哥哥，是最关心他妹妹安全的-,所以我想让你们看这篇文章。

耶鲁公开课 - 弥尔顿课程节选

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

You've got people from the outskirts coming in for food and safety; but, the population is slightly over two million people, and that's a lot of mouths to feed.

人们从郊区前往城市寻求食物和庇护,然而人口数量很快突破了二百万,人人都在等米下锅

耶鲁公开课 - 1871年后的法国课程节选