1. 干涉;干预;介入
    If you intervene in a situation, you become involved in it and try to change it.

    e.g. The situation calmed down when police intervened...
           警方干预后，局势平息下来。
    e.g. The Government is doing nothing to intervene in the crisis.
           政府没有采取任何行动对这次危机进行干预。

2. 插话;打岔
    If you intervene, you interrupt a conversation in order to add something to it.

    e.g. Hattie intervened and told me to stop it...
           哈蒂打断我，叫我停下来。
    e.g. 'I've told you he's not here,' Irena intervened.
           “我告诉你了他不在这里,”伊雷娜插话说。

3. 干扰;阻挠;打扰
    If an event intervenes, it happens suddenly in a way that stops, delays, or prevents something from happening.

    e.g. The South African mailboat arrived on Friday mornings unless bad weather intervened...
           除非受恶劣天气干扰,南非邮船一般在星期五上午抵达。
    e.g. I pray that death may not intervene to prevent our meeting with my darling children.
           我祈祷死亡不要阻挠我们与我亲爱的孩子们见一面。