- 直: straight; stiff
- 阶梯: a flight of stairs; ladder; ...
- 垂直阶: vertical stage
- 阶梯: (台阶和梯子, 比喻向上的凭借和途径) a flight of stairs; ladder; staircase; step 进身的阶梯 stepping stone; 一段十二级的阶梯 a staircase of 12 steps; 阶梯教室 theater; theatre; lecture theater; 阶梯结构 hierarchic structure; 阶梯矩阵 echelon matrix
- 13阶梯: the 13th floor; the thirteenth floor
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