double ax双刃斧doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-hulled双重机壳double fallback双故障低效率运行double lysogeny双重溶源性double-length双倍字长double riveting双秆铆接double taxation双重课税double-beddedadj.有双人床的；有两张床的；有双层床的double - clad双包层double knockout双剔除法double wishbone双垫架