名词
中文翻译：信封切断
同义词：
['envelope cut', 'envelope function例句：1. The envelope cut-off is used to prevent the contents from being seen by others.（信封切断用于防止内容被他人看见。）']
例句：
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1. The envelope cut-off is used to prevent the contents from being seen by others.
信封切断用于防止内容被他人看见。
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2. The envelope cut-off function is activated when opening the letter.
当打开信件时，信封切断功能会被激活。
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3.The envelope cut-off is a security feature that prevents unauthorized access to sensitive information.
信封切断是一种安全特性，防止未经授权访问敏感信息。