The immediate flashpoint was Wednesday's big rally in the city centre.冲突的直接起因是周三在市中心的大型集会。

There are still plenty of potential flashpoints in relations between the two countries.两国关系中仍有很多潜在的冲突爆发点。

The crisis in that troubled country neared a flashpoint last week.那个动乱的国家上周濒临冲突爆发的边缘。