envelope
'envәlәup
基本解释
n. 信封, 封套, 封袋
[医] 膜, 包袋
英文释义
n. a flat (usually rectangular) container for a letter, thin package, etc.
n. any wrapper or covering
n. a curve that is tangent to each of a family of curves
n. a natural covering (as by a fluid)
词形变化
上一个单词：envelop manual feed
下一个单词：envelope antigen