双高斯透镜Biotar lens【光】;double Gauss lens【光】
双指数修匀法method of double exponential smoothing【统计】
双线鞋沿缝合机double thread shoe border stitcher
【电学】双头管形灯【电学】双头灯管double-ended tubular lamp
双交替法double alternate method
双谱分光双星double-line spectroscopic binary【天】
【化】 双链DNAdouble-stranded DNA
双重分布double distribution【数】