名词
中文翻译：印记
同义词：
['mark', 'number', 'signature']
例句：
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1.The stamp on the envelope indicates that it has been opened.
信封上的印记表明它已经被打开过。
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2. The company's official seal is a symbol of its authority.
公司的官方印章是其权威的象征。
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3. The serial number on the license plate helps to identify the vehicle.
车牌上的序列号有助于识别车辆。