intervene
/ˌɪntəˈviːn/verb
no obj.
1
- come between so as to prevent or alter a result or course of events（为防止或改变某事件结果或过程）插入, 插手, 介入; 干预, 干涉：
he acted outside his authority when he intervened in the dispute
他越权介入这场纠纷
with infinitive their forces intervened to halt the attack.他们的部队插手中止了这次攻击。
1.1
- (of an event or circumstance) occur as a delay or obstacle to something being done（造成延缓或阻碍的事件或情形）发生, 来到于其间：
Christmas intervened and the investigation was suspended.
这期间圣诞节来到了, 调查暂停。
1.2
- interrupt verbally插话, 打岔：
with direct speech 'It's true!' he intervened.“这是真的！”他插话说。
1.3
- Law interpose in a lawsuit as a third party【律】（作为第三方）介入诉讼。
2
- usu. as adj. intervening occur in time between events前后两件事间发生：
to occupy the intervening months she took a job in a hospital.
为了打发期间的这几个月她在医院里找了份工作。
2.1
- be situated between things位于（事物）之间：
they heard the sound of distant gunfire, muffled by the intervening trees.
他们听到了远处传来的枪声, 只是由于树林间隔, 枪声减弱了。
派生词
intervener
nounintervenient
adjectiveintervenor
noun词源
late 16th cent. （in the sense 'come in as an extraneous factor or thing'）： from Latin intervenire, from inter- 'between' + venire 'come'.