step基本解释
n,步，脚步；步骤；步伐；[建]梯级,同近
a video of baby’s first steps.一盒婴儿学步的录像带
步，脚步；步骤；步伐；梯级英释nnthe movement you make when you put one foot in front of or behind the other when walking
step by step,adv. 逐步地.短语
