| 释义 |
en·ve·lope /ˈenvələʊp, ˈɒn-/ n. | phr.
n.
1. 信封
2. 包裹物；封皮，封套；外表；外壳
the envelope of air around the earth 环绕地球的大气层
3. 真空管外罩
4. 【电信】包络(曲)线
5. 【数】包络线；包络面
6. 【植】包被
7. 【生】膜，包袋
8. 【天】包层
9. 【空】(飞艇或气球的)气囊；(飞艇的)蒙皮
10. (特定飞机或系统等的)极限数据
[< Fr enveloppe < envelopper to wrap around; 见 ENVELOP] phr. push the envelope (或 the edge of the envelope) 〈口〉挑战极限，把…发挥到极致 They didn't push the envelope further. 他们并没有发挥到极致。 Ads seem to be pushing the envelope of taste every day. 广告似乎天天都在向我们的欣赏极限提出挑战。the back of an envelope 见 back¹ |