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首頁英語詞典envelopeenvelope英英釋意

envelope

英 ['env?l??p; '?n-]
  • n. 信封，封皮；包膜；[天] 包層；包跡

英英釋意

1. a flat rectangular paper container for papers
2. any wrapper or covering
3. a curve that is tangent to each of a family of curves
4. a natural covering (as by a fluid);
"the spacecraft detected an envelope of gas around the comet"
5. the maximum operating capability of a system;
"test pilots try to push the envelope"
6. the bag containing the gas in a balloon