动词短语
中文翻译：留意
同义词：
['watch out for', 'be on the lookout for']
例句：
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1. We shouldkeep an eye out for any suspicious activity in the area.
我们应该留意该地区的任何可疑活动。
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2. He kept an eye out for his lost keys and found them under the tree.
他留意到他的丢失的钥匙，并在树下找到了它们。
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3. The police are keeping an eye out for any criminals who might be hiding in the city.
警方正在留意任何可能藏匿在城市中的罪犯。