envelope
英 [ˈenvələʊp]
[NOUN]
envelopes
1. [C 可数名词] 信封
An envelope is the rectangular paper cover in which you send a letter to someone through the mail.
NOUN. 名词
push the envelope
1. 挑战极限 , 突破常规
If someone pushes the envelope, they do something to a greater degree or in a more extreme way than it has ever been done before.
双语例句
例：There's a valuable place for fashion and design that pushes the envelope a bit.
打破常规的时尚和设计有重要地位。
PHRASE. 习语
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