短语
双道梳棉纱
double carded yarn
双道金属镶嵌法
dual damascene
双重道德标准
double moral standard
;
Dual standard of morality
双车道
two-lane
;
double lane
双边渠道
bilateral channels
双道天线收发转换开关
two-channel duplexer
双通道
Dual Channel
;
Twin channel
;
DUAL
双向快车道
a two-way express lane