步, 脚步
an act or movement of putting one leg or foot in front of the other in walking or running
台阶, 踏步
a flat surface, especially one in a series, on which to place one's foot when going up or down
步骤, 阶段
a measure or stage in a process or series
迈步, 走
lift one's foot and put it down in a different place, as in walking