double egg二重卵, 卵中卵
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double criminality双重罪
double budded tree双重芽接树
double block valve双隔断阀
double U interface双U口
double channel RDC双路RDC
double decker oven双层炉
double the bandage把绷带对折
double span tunnel连拱隧道
double-sided bed双面冷床
double edged knife双刃刀