| 释义 |
envelope/ˈenvələʊp, ˈɒn-/n. 1 a folded paper container, usu. with a sealable flap, for a letter etc. 信封 2 a wrapper or covering 封套，封皮，外套，包封 3 the structure within a balloon or airship containing the gas (热气球、飞艇的)气囊 4 the outer metal or glass housing of a vacuum tube, electric light, etc. (真空管、电灯等的玻璃或金属)外壳，外罩 5 Electr. a curve joining the successive peaks of a modulated wave 【电】(调制波的)包络 6 Bot. an enveloping structure, esp. the calyx or corolla (or both) 【植】包被(尤指花萼或花冠或两者之合称) 7 Math. a line or curve tangent to each line or curve of a given family 【数】包络线；包络面 [French enveloppe (as ENVELOP)] |