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Envelope
01
封筒
a thin, paper cover in which we put and send a letter
02
封筒, 包み
any wrapper or covering
03
エンベロープ, バルーンの袋
the bag containing the gas in a balloon
04
運用の境界, 最大運用能力
the maximum operating capability of a system (especially an aircraft)
05
包層
a natural covering (as by a fluid)
06
エンベロープ, 包絡線
a curve that is tangent to each of a family of curves
envelope
n
例
The envelope contained a surprise birthday card.
She found an old envelope with photos in it.
She handed me an envelope with a note inside.
He wrote the address on the envelope.
I need to buy some envelopes for my Christmas cards.
