One action can 'spark off' another.

一个动作可以引发另一个动作。

The price war sparked off fierce competition between the two companies.

价格战引发了这两家公司间的激烈竞争。

Charged particles guided by these magnetic fields can simply fly off the weak ends like sparks off a live wire.

带电粒子被这些磁场引导，能轻易飞出这个脆弱的边界（大气层），就像火花从电线那里飞出一样。

So, for example, a disagreement could spark off an argument or a fight.

例如，分歧可能会引发争论或争斗。

The unrest was sparked off by suspected far-right activists burning a copy of the Koran. Rister Perker reports.

骚乱是由疑似极右翼活动分子焚烧《古兰经》引发的。请听李斯特·坡客的报道。

Nuclear power has always been a topic that has sparked off considerable debate.

【debate】核能一直是引起相当多争议的话题。

The Dornish nights grow cold out upon the sands. Garin gathered wood for them, bleached white branches from trees that had withered up and died a hundred years ago. Drey built a fire, whistling as he struck sparks off his flint.

多恩沙漠的夜晚冷极了。盖林为大家搜集木柴，白花花的枝干来自一百年前枯死的树木。德雷一边吹口哨，一边用燧石打出火星，点起篝火。

General Motors Research Laboratories have spent years of time and millions of dollars trying to find out how and why a spark in the cylinder sets off an explosion that makes your car run; and they don't know the answer.

通用汽车研究实验室花费了数年的时间和数百万美元试图找出气缸中的火花如何以及为什么会引发爆炸，从而使您的汽车行驶；他们不知道答案。