Work Envelope工作行程;工作包封
envelope curve[统计] 包络曲线;包络线;包含曲线
envelope antigen包膜抗原;包被抗原;囊膜抗原;膜抗原
Temperature envelope温度范围;温度范畴
air envelope大气层;空气层;二次风;外包空气
pulse envelope脉冲包络;[电子] 脉冲包线
Digital envelope数字信封;数位信封;位信封;数字封装
glass envelope玻璃封装;[电子] 玻壳;玻璃泡;玻璃容器
envelope virus有包膜病毒;膜病毒
N-COUNT（可数名词） An envelope is the rectangular paper cover in which you send a letter to someone through the mail. 信封
PHRASE（习语） 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. 挑战极限; 突破常规
There's a valuable place for fashion and design that pushes the envelope a bit.
突破点儿常规的时尚和设计有其宝贵地位。