twonkn.<俚> 傻瓜；笨蛋（用于英国）twonum.二；两个two reboilers双再沸器two-circuit双槽路,双路,双回路two injection双缝射流two-solvent双溶剂two tube lens双筒透镜two-hop-E第二E层波two-shipper双机two positions两阵地two fold yarn双股线two movements二次动作