名词
中文翻译：发送者
同义词：
['sender', 'sender', 'sender']
例句：
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1.The sender of the email was unknown.
发件人身份未知。
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2. The sender of the message has not been identified.
未确认消息的发送者。
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3.The sender of the package is to be contacted at your earliest convenience.
请尽快联系包裹的发送方。