动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1. The team worked hard to keep the game score close.
团队努力工作，保持比赛得分接近。
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2. We need to keep our promises and follow through on them.
我们需要遵守承诺并付诸实践。
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3. The company kept its promise of hiring new employees.
公司履行了招聘新员工的承诺。