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| 单词 | envelope |
| 释义 | envelopenoun en·ve·lope ˈen-və-ˌlōp 1 : a flat usually paper container (as for a letter) 2 : something that envelops : wrapper the envelope of air around the earth 3 a : the outer covering of an aerostat b : the bag containing the gas in a balloon or airship 4 a : a natural enclosing covering (such as a membrane, shell, or integument) b : a lipoprotein unit membrane that forms the outer layer of some virions 5 a : a curve tangent to each of a family of curves b : a surface tangent to each of a family of surfaces 6 : a set of performance limits (as of an aircraft) that may not be safely exceeded also : the set of operating parameters that exists within these limits 7 : a conventionally accepted limit new computers that push the envelope envelope nounas in package Synonyms & Similar Words Relevance
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