| 单词 | impenetrability | 
| 释义 | im·pen·e·tra·bil·i·ty    (ĭm-pĕn′ĭ-trə-bĭlĭ-tē)n. 1.  The quality or condition of being impenetrable. 2.  The inability of two bodies to occupy the same space at the same time.  | 
	
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