首页英语词典envelopeenvelope英英释意

envelope

英 ['envələʊp; 'ɒn-]
  • n. 信封,封皮;包膜;[天] 包层;包迹

英英释意


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