The two children enjoyed travelling on the tube railways and going down the movingstairs which lead to the platforms.
两个孩子喜欢乘坐地铁,让活动电梯把自己送到站台上去。
2
They were all moving toward him down the stairs.
他们都正朝着他走下楼梯。
《柯林斯英汉双解大词典》
3
They also have difficulty with stairs and descend feet-first. However, researchers also report seeing quadrupeds' running ', moving agilely over rough terrain and travelling long distances.