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1·He kept a sharp lookout for any strangers.

他警惕地守望着，不放过任何一个陌生人。《牛津词典》

2·The public should be on the lookout for symptoms of the disease.

公众应当留心这种疾病的症状。《牛津词典》

3·Be on the lookout for someone whose color you admire.

注意你羡慕的某些人的发色。

4·Being on the lookout for signs of depression in a family member.

注意家庭成员抑郁的迹象。

5·They got sharpshooters in helicopters on the lookout for polar bears.

他们的直升机上配有神枪手，时刻注意着是否有北极熊出没。

6·Studios and the comedians are always on the lookout for good material.

工作室和喜剧演员们总是在不断地寻找新的素材。

7·The researchers recommended that doctors and women be on the lookout for.

研究者建议医生和妇女们要注意以下情况。

8·That is why she is always on the lookout for possible danger and startles easily.

这也就是她为什么总是关注着可能出现的危险而且容易一惊一乍。

9·Today, it hunts alone, a sign the dingo is probably on the lookout for a small game.

今天它是独自打猎，这是野狗可能寻找小猎物的迹象。

10·Then be on the lookout for new opportunities. Take them when they arise and enjoy life.

然后，在工作之余可以关注一些新的机会，机会来的时候抓住它，享受生活。