an act or movement of putting one leg in front of the other in walking or running.
Ron took a step back
同义词：
pacefootstepstridefootstepfootfalltreadtramp
2
a flat surface, especially one in a series, on which to place one's foot when moving from one level to another.
the bottom step of the staircase
同义词：
stairtreadtread boardstairsstaircasestairwaystoop
3
a measure or action, especially one of a series taken in order to deal with or achieve a particular thing.
developers must take steps to reassure local people that their voices will be heard
同义词：
course of actionmeasuremoveactactionprocedureproceedinginitiativemaneuvertacticstrategystratagemoperationdémarchetake actiontake measuresacttake the initiativemove
4
Physics
an abrupt change in the value of a quantity, especially voltage.
5
a block, typically fixed to the vessel's keel, on which the base of a mast is seated.
动词
1
lift and set down one's foot or one foot after the other in order to walk somewhere or move to a new position.
