a flat (usually rectangular) container for a letter, thin package, etc.
any wrapper or covering
a curve that is tangent to each of a family of curves
a natural covering (as by a fluid)
the maximum operating capability of a system (especially an aircraft)
the bag containing the gas in a balloon
動詞 envelop:
enclose or enfold completely with or as if with a covering
造句
envelope
envelope gain
envelopecurve
envelope jump
envelope line
envelope virus
Envelope genes
envelope noise
envelope delay
envelopes mean
envelope paper