名词
中文翻译：Unknown
同义词：
['assassin', 'assassin', 'attacker']
例句：
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1.The bolt cropper was a surprise to everyone.
那个突然袭击者让每个人都感到惊讶。
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2.He was the last person to know about the attacker's identity.
他是最后一个知道袭击者身份的人。
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3. The attacker was caught by the police after a short chase.
袭击者在一次短跑后被警方抓获。