求翻译：将一对电极插入水中，通以电流，氢离子逐渐向阴极移动，在阴极上取得电子被还原为H2。Na＋或K＋离子在电解液的浓度下，其析出电位要比氢析出电位负得多，因此阴极上H＋先放电，析出氢；OH－逐渐移向阳极，阳极失去电子而被氧化为O2。是什么意思？

A pair of electrodes inserted in the water to pass current, hydrogen ions move gradually to the cathode, cathode made of electronic was restored as the H2. Na+ or K+ ion in electrolyte concentrations, its precipitation is much more potential than the hydrogen emission potential negative, cathode H+

A pair of electrodes inserted in the water to pass current, hydrogen ions move gradually to the cathode, cathode made of electronic was restored as the H2. Na+ or K+ ion in electrolyte concentrations, its precipitation is much more potential than the hydrogen emission potential negative, cathode H+