名词
中文翻译：单签名
同义词：
['single signature', 'singular signature']
例句：
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1. The document was signed by only one person.
这份文件只有一个人签字。
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2. The agreement was made with a single signature.
协议是用单签名达成的。
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3.The company's policy requires all employees to have a single signature on the form.
公司的政策要求所有员工在表格上都需要用单签名。