periodically
ad. 周期性地,定期地

例句与用法:

  1. A device that periodically and automatically opens and closes an electric circuit, producing pulses.
    断续器一种阶段性的能自动打开及关闭电路并产生脉冲的仪器
  2. New strains of viruses appear periodically.
    新菌系的细菌周期性地产生

英英解释:

副词 periodically:

  1. in a sporadic manner
  2. 同义词:sporadically