名词
中文翻译：Unknown
同义词：
['outer body', 'foreign object', 'foreign matter']
例句：
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1.The scientist discovered a foreign body in the sample.
科学家在样本中发现了异物。
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2.The foreign body caused damage to the machine.
异物损坏了机器。
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3. The foreign body was removed from the patient's body.
将异物从病人体内移除。