1、阶梯步级
...capital flight资金外流flight of stairs阶梯步级flight simulator飞行模拟器；飞行模拟装置；飞行练习器 ...
2、楼梯间
... 空气缓冲间 air lock 楼梯间 staircase; flight of stairs 幕间 interval (between acts in theater) ...
3、门路步级
...flight of steps楼梯阶段flight of stairs门路步级flight conveyor链板传收带 ...
flight t of stairs阶梯步级
a flight of stairs一段楼梯;飞翔;阶梯;一段
one flight of stairs一段台阶
Digital a flight of stairs数字阶梯
a whole flight of stairs整整一段楼梯
take a flight of stairs走一段楼梯
on one flight of stairs在一个楼梯;一个楼梯;乘一段楼梯;上一个飞行的楼梯