step in的意思？

step in的音标：step in的英式发音音标为：[step in]step in的美式发音音标为：[stɛp ɪn]...

If no agreement was reached, the army would step in.如果无法达成协议，军队将会介入。It was she who guided my every step in the working - class movement.是她在工人运动中指导我的每一步行动.We had to step in mud over our ankles.我们必须进入没脚的泥塘....