doubledadj.两倍的；快步走的；加倍努力的动词double的过去式和过去分词形式.doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double duty双重任务double fans双风机double root二重根double deep双沟底(衰退)double ends双经double taken.心不在焉后突然注意而恍然大悟double passadj.双程的double skinadj.双层的double ring双轮double bank双排梯架