Double on双行靠doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份Double line sign双线征double sucklings哺育双犊double threshold双阈double burnisher双头磨光器double shrinkage双重收缩,二次收缩double hardening双硬化double electrode双导电极double spearhead双中锋double POD model双POD模型Double watermark双水印