名词
中文翻译：Unknown
同义词：
['signature', 'endorsement', 'verification']
例句：
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1. The company's counter signature is required for the contract.
公司要求合同上有公司的反签。
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2. The signature on the document was not valid.
文件上的签名无效。
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3. The signature of the witness was verified by the court.
证人的签名被法庭验证。