近年来，社会不安定事件接连不断地发生，人们对安全的需求越来越强烈。

In recent years, instable social events happen continually and people need more and more security.

youdao

近年来，社会不安定事件接连不断地发生，人们对安全的需求越来越强烈。

In recent years, instable social events happen continually and people need more and more security.

youdao