1. step in
   v.走进,插手帮助,作短时间的非正式访问
   

1. They have made a big step in their business.
   他们在事业上迈进了一大步。
2. She summoned up her courage and stepped in.
   她鼓起勇气走了进去。
3. All right. Step in, please.
   行。请上车。
4. The dog barked when he heard steps in the garden.
   狗听到花园里有脚步声时吠叫起来。
5. This career move is a step in the right direction.
   这次变动是你在事业上的一次迈进

　1个名词解释