two setn.两盘；半快赛twonum.二；两个two-effect distillation双效精馏two-level energy system二能级系统two-dimensional drawing二维图two-dimension workbench二维运动平台two-coordinate tracking双坐标跟踪two-layer magnetic tape双层磁带two regiments of infantry两团步兵two tone telegraph system双音电报制Two roads connect here.两条道路在此连接。two-stage concentration两段浓缩