periodically [pɪrɪˈɑdɪklɪ]

例句:

• Meetings are held periodically to monitor progress on the case.
  定期举行会议以监督案件的进展。
  来自柯林斯例句
• Periodically, bursts of automatic gunfire could be heard.
  来自NEWYORKER
• Convoys of black Mercedes sedans periodically swept through town.
  来自NEWYORKER
• Police were periodically patrolling the area.
  警察定时在这一地区巡逻。
  
• The geyser erupts periodically.
  间歇泉周期性地喷发.
  
• Periodically, he stopped to hug or kiss her.
  来自NEWYORKER