over and over again

• 再三挽留

  urge someone to stay over and over again

• 再三提醒

  warn someone over and over again

• 再三解释

  explain over and over again

• 再三考虑

  consider something over and over again

• 言之再三

  repeat something over and over again

• 这种想法已经再三给他解释过了。

  I've already explained this idea to him over and over again.