名词
中文翻译：未经请求的输入
同义词：
['uninvited', 'unwelcome', 'impolite']
例句：
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1. The guests were unsolicited keyins, and the hostess was overwhelmed.
客人是未经邀请就到访的，女主人感到不知所措。
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2. She entered the room without knocking, which was an unsolicited keyin.
她没有敲门就进入了房间，这是不礼貌的行为。
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3. He was unwelcome in the company of his colleagues, as they had all been invited tothe party.
他和他的同事一起被拒之门外，因为他们都被邀请参加聚会了。