doublemakeadj.双闭合的doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-pipe type双管理double projectiles双头弹double crop system双季栽培制double-barrelledadj.双筒的adj.双重目的的；复合的adj.模棱两可的；含糊的；意义双关的doubleacting hinge双动铰链double closing hoop双闭箍double-boom jumbo双臂钻车double - keyboard双排键double up converter二次上变频器double malformation重复畸形