envelopment
包封;封皮;包裝紙
En·vel·op·ment n.
1. The act of enveloping or wrapping; an inclosing or covering on all sides.
2. That which envelops or surrounds; an envelop.
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envelopment
n : the act of enclosing something inside something else [syn: enclosure,
enclosing, inclosure]