1 intervene (in sth) to act in a way that prevents sth happening or influences the result of sth 介入；调停；斡旋: She would have died if the neighbours hadn't intervened. 要不是邻居出面调停，她早就没命了。to intervene in a dispute 调停纠纷

2 to interrupt sb who is speaking in order to say sth 插嘴；打岔

3 (used about events, etc) to happen in a way that delays sth or stops it from happening （指事件等）阻碍，阻止（某事发生）: If no further problems intervene we should be able to finish in time. 如果不再出问题，我们当能按时完成。 ➔intervention /ˌɪntəˈvenʃn ||; ˌɪntɚˈvɛnʃən/ noun [U,C]: intervention (in sth) military intervention in the crisis 对这场危机的军事干预