动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1. The team needs to keep the temperature at a comfortable level.
团队需要将温度保持在舒适的水平。
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2. The old house was kept well-maintained by its previous owners.
这座老房子由前主人妥善维护得很好。
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3. The company is keeping an eye on the market trends.
该公司正密切关注市场趋势。