| 单词 | metastasis | 
| 释义 | metastasis [mǝ`tas·tǝ·sǝs]  MEDICINE Transfer of the causal agent (cell or microorganism) of a disease from a primary focus to a distant one through the blood or lymphatic vessels.  PHYSICS A transition of an electron or nucleon from one bound state to another in an atom or molecule, or the capture of an electron by a nucleus.  | 
	
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