If you make a promise, you should keep it.

如果你许下一个诺言，你就应该遵守它。

《柯林斯英汉双解大词典》

We have the initiative; we intend to keep it.

我们拥有主动权；我们想要保持主动权。

《柯林斯英汉双解大词典》

Here's your passport. Now keep it safe.

这是你的护照。你可保管好了。

《牛津词典》

Doctors used a catheter and placed two mesh tubes, called stents, into a blocked artery to help keep it open.

VOA: special.2010.02.17

Now I suppose it's my reluctance to get into the intricacies of questions having to do with applied theory that makes me prefer to keep it simple.

我不愿意在,应用理论上纠结,因此想把它简单化。

耶鲁公开课 - 文学理论导论课程节选

instead, he threw in a six-week-old puppy and said "keep it!" and ran away. So I got a puppy.

但他却扔进来了一只六个月大的小狗，说“养它吧！”然后跑掉了。于是我有了一只小狗。

大城市是否危险？ - SpeakingMax英语口语达人

The detachable cord is handy, but there's no locking mechanism to keep it in place.

ENGADGET: blogger-avatar

So I want to do everything I can to keep it the way it should be.

BBC: The perfect trip: Thailand

As for the third and fourth chapters, Dallas prefers to keep it a secret for now.

FORBES: Forget First Person Shooters. Try 'The Unfinished Swan,' a First Person Painter