twonum.二;两个
two gaps二间隙
two tieradj.双重的
two portadj.四端的(二端对的)
two back后拉驾驶杆
two ribs两肋
two outs二出局
two stepadj.二阶(二阶段;分二期的)
twocolor双色
two unit双机组
Two-EC双变量误差修正