Police have asked residents to keep an eye out for anything suspicious.

警方要求居民密切注意一切可疑的情况。

《牛津词典》

If neighbors are strangers to one another, they are less likely to sweep the sidewalk of an elderly couple living next door or keep an eye out for young trouble makers.

如果邻居彼此都是陌生人，他们就不太可能打扫住在隔壁的老年夫妇门前的人行道，也不太可能留意到一些捣乱的年轻人。

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If you've explored the area before, keep an eye out for familiar sights—you may be surprised how quickly identifying a distinctive rock or tree can restore your bearings.

如果你以前曾探索过这一区域，请密切留意熟悉的景物——你可能会惊讶于，认出一块独特的岩石或一棵奇特的树竟能如此迅速地让人重获方向。

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Authorities here depend on the public to keep an eye out for unusual packages or passengers.

VOA: standard.2010.04.01

The "Vinca String Quartet" so keep an eye out for them.

长春花弦乐四重奏乐团,请关注他们

耶鲁公开课 - 聆听音乐课程节选

Keep an eye out for this, particularly in pop music.

注意一下音乐的结构,特别是流行音乐

耶鲁公开课 - 聆听音乐课程节选

Keep an eye out for the stock movement after the next steps are actually announced.

FORBES: Investors Vote Against L��o Apotheker, Again. Next Vote is on the HP Board.

So, if you are still uncertain, keep an eye out for a trial weekend.

FORBES: Move up http://i.forbesimg.com t Move down

We'll keep an eye out for good books about language, and mention them when we can.

ECONOMIST: Language