名词
中文翻译：Unknown
同义词：
['remain', 'hold', 'maintain', 'keep']
例句：
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1. Back stay is important for our health.
保持健康需要良好的饮食习惯。
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2. The team needs to back stay together and work together effectively.
团队需要团结一致，有效合作。
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3. She decided to back stay in the city after her husband's death.
丈夫去世后，她决定留在城市里。