periodic discharge

例句：

1. 1. The power grid is prone to periodic outages due to the frequent use of electronic devices.
   由于频繁使用电子设备，电网容易发生周期性停电。
2. 2. During the 19th century, periodic waves were discovered in nature.
   在19世纪，人们发现了自然中的周期性波。
3. 3. The periodic table of elements was developed by the Swedish scientist Svante Arrhenius.
   瑞典科学家斯文特·阿伦尼乌斯提出了元素周期表。