doubleveeadj.双v形的(X形的)doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double corpus双向主体double-hung双吊钩double lesson双节课double ridges双脊线Double circle双环double filter双滤器,双级过滤器double spring双叠板簧double cavity复合腔double sculls双人双桨比赛double sleeve双套管