基本解释[動力與電氣工程]死信箱[計算機科學技術]死信箱英英字典柯林斯英英字典 a place where messages and other material can be left and collected secretly without the sender and the recipient meeting dead-letter box剑桥字典dead-letter box柯林斯字典专业释义動力與電氣工程死信箱計算機科學技術死信箱