动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1. The old house needs to be kept in good condition.
这座老房子需要好好保养。
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2. We need to keep an eye on the children while they are playing outside.
孩子们在外面玩耍时，我们需要留意他们。
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3. The team is determined to keep winning the championship.
这个团队决心赢得冠军。