步骤
a flat surface, especially one in a series, on which to place one's foot when moving from one level to another.
示例:• the bottom step of the staircase同义词:stairtreadtread boardstairsstaircasestairwaystoop
步骤
a flat surface, especially one in a series, on which to place one's foot when moving from one level to another.
示例:• the bottom step of the staircase同义词:stairtreadtread boardstairsstaircasestairwaystoop