名词
中文翻译：Unknown
同义词：
['murderer', 'assassin', 'killer']
例句：
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1.The murderer was caught after a long investigation.
经过长时间的调查，凶手被抓获。
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2.The assassin's plan to kill the president failed.
暗杀者试图刺杀总统的计划失败了。
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3.The killer escaped from the police custody.
凶手从警方手中逃脱了。