step in

• • 走进：

    to step in the meeting-house

    步入会场

  • 串门，登门造访：

    Here we are, this is my house. Why don't you step in?

    我们到了，这就是我家，进来坐一会儿吧!

  • 伸脚穿进：

    to step in the slippers

    伸脚穿上拖鞋

  • 插手，介入，干涉：

    Seeing such a situation, I had to step in.

    看到这种情况，我不得不出来解围了。

    to step in with an offer of weapons

    提供武器进行干预