名词
中文翻译：保证
同义词：
['guarantee', 'assurance', 'guarantee', 'warranty']
例句：
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1. The company promises to deliver the goods within two weeks.
公司承诺在两周内交付货物。
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2. He gave me a guarantee that he would return the money if I lost it.
他给了我一个保证，如果我丢了钱他会把钱还给我。
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3. The product has a warranty of one year.
该产品有一年的保修期。