• 干预，涉足

Verb:

1. get involved, so as to alter or hinder an action, or through force or threat of force;

   "Why did the U.S. not intervene earlier in WW II?"
   

2. act as a substitute;

   "She stood in for the soprano who suffered from a cold"
   

1.介入，干预，插手(棘手问题)
If youstep in, you get involved in a difficult situation because you think you can or should help with it.

e.g. If no agreement was reached, the army wouldstepin...
如果无法达成协议，军队将会介入。
e.g. There are circumstancesin which the State muststepin to protect children.
有些情况下，国家必须出面保护儿童。

1. step in是什么意思

1. 插入,介入：stay by守在一边 |stepin插入,介入 |step up提高,加快,加紧

2. 介入;干预;参加：step bystep 逐步地,一步步地 |stepin 介入;干预;参加 |step up 走近来;登上去

3. 便鞋(有松紧带式)：steer hide閹牛皮 |step-in便鞋(有鬆緊帶式) |step-on便鞋(無鬆緊帶式)

4. 介入：20.profit margin 利润幅度 | 21.stepin 介入 | 22.rally 繁荣

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.

The police are reluctant to step in.

警察不愿插手干预.

It marks a forward step in human progress.

这标志着人类发展的一次进步.

There's still one more step in the process.

还差一道工序.

A step in temperature on the FahrenheIt'scale is smaller than a step on the Centigrade scale.

华氏温度计的一度比摄氏温度计的一度小一些.

The announcement was welcomed as a step in the right direction, but was widely seen as a token gesture.

该公告被认为是向正确方向迈进的一步，因而受到欢迎，但也被普遍看作是一种象征性的姿态。

The elections were a step in the right direction, but there is a lot more to be done.

举行选举是迈出了正确的一步，但仍有很多事情要做。

Companies are using every trick in the book to stay one step in front of their competitors.

各公司想方设法地保持比竞争者领先一步的优势。

' No , ' he said, ' Carrie's out; but won't you step in?

“ 不在, " 他说, " 嘉莉出去了, 不过请进来好 吗 ?

A step in temperature on the Fahrenheit scale is smaller than a step on the Centigrade scale.

华氏温度计的一度比摄氏温度计的一度小一些。

Prissy was sitting on the bottom step in the hall, panting.

百里茜气喘吁吁地坐在过厅的楼梯脚下.

Your paper marks a forward step in the research.

你的报告标志着研究工作的向前发展.

We must step in any matter that does not agree with principle.

我们必须干涉任何不符合原则的事情.