Double T四环素[四环素类抗生素]doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double spiral双螺旋线Double Dragon双截龙double bottle双层瓶double nickel法定55英里最高车速double kidney重肾double dabble双击, 双加倍double plains双层平纹织物double tackle双轮滑车double flower重瓣花double e core双 e 型铁芯