名词
中文翻译：保证
同义词：
['surety', 'assurance', 'warrant']
例句：
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1.The company guarantees the quality of its products.
公司保证其产品的质量。
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2. He guaranteed that he would return the money to the bank.
他保证他会把钱还给银行。
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3. The agreement guarantees their mutual cooperation.
该协议保证了他们的相互合作。