他的头痛问题每隔几周就会再次出现。

His headache problem ___recurred every few weeks.

那个童年记忆时常浮现在我脑海中。

That childhood memory often ___recurred in my mind.

程序在遇到错误时会自动重复计算步骤。

The program automatically ___repeated the calculation steps when it encountered an error.