recurs

例句:

• Leap year recurs every four years.
  闰年每四年出现一次。
  来自《权威词典》
• This theme recurs several times throughout the book.
  这一主题在整部书里出现了好几次。
  
• The disease recurs in epidemic cycles at two - to three - year intervals .
  本病流行周期为 2-3年.
  
• However, the cancer almost always recurs after surgery.
  来自SA
• That is an error the recurs repeatedly in science.
  来自SA
• However, if it recurs you should be checked out.
  来自BBC