动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1. The housekeeper keeps the kitchen clean and tidy.
管家保持厨房干净整洁。
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2. We need to keep our promises to avoid any misunderstandings.
我们需要遵守承诺以避免任何误解。
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3. The team kept working even when they were tired.
即使他们累了，团队还是坚持工作。