If you would like to start trampolining, you may first need to ask a doctor to make sure it's a safe activity for you.

如果你想开始玩蹦床，你可能首先需要请医生确保这对你是一项安全的活动。

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Astronauts began their first full day in space by inspecting the heat shield to ensure the shuttle is safe to return to Earth in two weeks.

VOA: standard.2009.07.16

because he viewed his first responsibility was to make sure the country is as safe as possibly can be.

因为他认为自己的首要任务是,让国家尽可能地,处在安全之中。

普林斯顿公开课 - 国际座谈会课程节选

what I'm talking about is a space, a safe space in our lives with our closest friends, with our family, first and foremost, with ourselves, will we have the permission to be human.

我的意思是一个空间，生活中的私密空间，和挚友一起时，和家人在一起时，最重要的是面对自己时，我们要准许自己为人。

哈佛公开课 - 幸福课课程节选

The slight hiccup allowed Jayson Nix to reach second safely and Overbay to be safe at first.

WSJ: Pettitte, Rivera help Yankees beat Royals 3-2

However, at the very least, we know that investors are going to have to pay a premium price for an asset that may not be as safe as first thought.

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The 22-year-old made it safe in first-half injury-time when he did well to turn on the edge of the penalty area and slide a low shot past the despairing dive of goalkeeper Zeng Cheng.

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