| 单词 | inclusion | 
| 释义 | inclusion [in`klü·zhǝn]  CRYSTALLOGRAPHY 1. A crystal or fragment of a crystal found in another crystal.  2. A small cavity filled with gas or liquid in a crystal.  CYTOLOGY A visible product of cellular metabolism within the protoplasm.  METALLURGY An impure particle, such as sand, trapped in molten metal during solidification.  PETROLOGY A fragment of older rock enclosed in an igneous rock.  | 
	
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