步: Ⅰ名词1.(步度; 脚步) pace; step 短语和例子正步 parade step; goose step; 寸步难移 in difficult pass; can not move a single step; 大步前进 advance with big strides; 快步走 walk at a quick pace; 学步 learn to walk; 散步
步步: step by step; at every step 短语和例子步步紧跟 follow at every step; 步步留心 be careful of every step; 步步小心 pick one's steps
Example Sentences:
1.
The electrode is driven by elliptical movement and its direction is controlled by t wo voltage phase - difference 为实现电火花电极的微米级步距，设计了椭圆微驱动电路，并能有效地控制电极的运动方向。
