to intentionally become involved in a difficult situation in order to improve it or prevent it from getting worse

The Central Bank intervened in the currency markets today to try to stabilize the exchange rate. 中央银行今天对货币市场进行了干预，试图稳定汇率。

[ + to infinitive ] The minister intervened personally to stop the museum from being closed. 部长亲自干预以阻止博物馆的关闭。

to happen between two times or between other events or activities

Two decades intervened between the completion of the design and the opening of the theatre. 从设计完成到戏院投入使用相隔20年。