动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1. The old house is kept in good condition by the care of its owners.
这座老房子由房主精心维护，状况良好。
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2. We need to keep our promises to each other.
我们需要相互承诺。
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3. The team kept their heads high despite the tough competition.
尽管竞争激烈，但队伍依然士气高昂。