动词
中文翻译：签名
同义词：
['mark', 'signify', 'indicate', 'declare']
例句：
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1. The company has signed a contract with the government.
该公司已与政府签订了合同。
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2. He signed the document before it was sealed.
他在文件被密封前签了字。
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3. The agreement was signed by both parties at the signing ceremony.
协议是在签约仪式上由双方签署的。