A feud between two families or clans that arises out of a slaying and is perpetuated by retaliatory acts of revenge; a blood feud.
族间血仇, 血系间的复仇由杀戳引起的并通过以牙还牙的报复行为而持续不断的两个家族或宗族之间的世仇; 血仇
Use this money when the need arises.
有需要时就使用这笔钱.
You should go there if occasion arises.
如果有机会, 你应当到那里去。
