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envelope[英][ˈenvələup] [美][ˈɛnvəˌlop, ˈɑn-] 生词本简明释义n.信封，封皮；壳层，外壳；包裹物；[生物学]膜，包袋复数：envelopes以下结果由 金山词霸 提供柯林斯高阶英汉词典 短语词组 同反义词1.N-COUNT信封An envelope is the rectangular paper cover in which you send a letter to someone through the post.2.PHRASE挑战限制尺度；突破原有底线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. There's a valuable place for fashion and design that pushes the envelope a bit...在原有尺度上有所突破的时尚和设计受到人们的重视。No cinema director had a more profound effect in pushing the envelope of acceptable family entertainment.在挑战家庭娱乐片的接受程度方面，没有哪个电影导演比他的影响更深远。
