Double low双低doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double serial communication双串口通信double circuit power supply双回路供电double pressed stearic acid二压硬脂酸double isotope scintigraphy双同位素闪烁显像(术)double wrap separating cell双层隔膜式电池double gun cathode ray tube双枪阴极射线管double act of communication两次交际过程double backward somersaults向后翻腾两圈double image effect picture重影效应图像double objective microscope双物镜显微镜