vi.

1. 胜过，战胜，优胜[（+over/against）]
   Good will prevail over evil.

   善良将战胜邪恶。

   His argument prevailed and I yielded.

   他的论点占了上风，我让步了。

2. 流行，盛行；普遍[（+among/in）]
   This custom prevails over the whole area.

   这一习俗在整个地区盛行。

v.

1. prove more powerful or superior.
   ▸be widespread or current.
2. (prevail on/upon) persuade to do something.