从以下词典查找:
历史:
高考 CET-4 CET-6 考研 BNC: 3672 COCA: 3879
envelope
en·ve·lope / 5ZnvE7lop ; 5envElEJp /noun C
1. a thin paper cover in which you put and send a letter信封:
envelopes and stamps信封和邮票
She tore open the envelope and frantically read the letter.她撕开信封慌忙看信。
He got a job stuffing envelopes (=filling them with letters) at the campaign headquarters.他找了一份在竞选总部装信封的工作。
SAE,SASE
2. a layer of something that surrounds something else外裹物; 外层:
[+ of ]
an envelope of gases around the planet包围着行星的大气层
3. push the envelope AmEto try to go beyond the normal limits of something超出正常限度:
a musician who pushes the envelope of improvisation突破即兴演奏界限的音乐家

© Copyright 2018