When astronauts go on spacewalks, they wear spacesuits to keep themselves safe.

当宇航员在太空行走时，会穿太空服以保证自己的安全。

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At the esoteric edge of the timekeeper's craft, they are too wobbly to keep time by themselves.

在这个原子钟的装置里，它们还是太不稳定了，不能靠自身确保时间。

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Some use them to keep a close watch on the demand for their line of work or gather information on compensation to arm themselves when negotiating for a raise.

有些人用它来密切关注自己所在行业的需求情况，或者收集有关薪酬的信息，以便在加薪谈判时为自己做好准备。

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Double jeopardize thousands of innocent lives; trying to buy avowal but could barely keep themselves alive.

VOA: special.2009.04.17

It is not to bind them from voluntary actions but to direct and keep them in such motion as not to hurt themselves by their own impetuous desires, rashness or indiscretion as hedges are set not to stop travelers but to keep them on their way."

不是约束他们去做本该做的事,而是约束他们不做不该做的事,以免因自己的欲望，轻率，鲁莽而危机自身，这就像是篱笆的功能一样,不是要阻挡行路而是为小路指引方向“

耶鲁公开课 - 政治哲学导论课程节选

What I find living in the Bay Area is people keep to themselves a lot.

我发现住在湾区的人生活很自我。

欧洲和美国的差异 - SpeakingMax英语口语达人

To date, apart from the odd minor traffic accident with other road users, the Chinese troops keep themselves to themselves.

BBC: In Hong Kong, life goes on

It had cheap land, weak trade unions and enough space to make sure that the various classes and races could keep themselves to themselves.

ECONOMIST: Trouble in paradise

The implication is that religious diversity causes people to keep themselves to themselves, and thus makes it harder for them to catch germs from infidels.

ECONOMIST: Religious diversity may be caused by disease