通过不断把带正电荷的钾离子和钠离子压出电池，电池内负电荷数量就会增加。
By pumping positively charged potassium and sodium ions out of the cell, the number of negatively charged ions inside the cells rises.
燃料电池像电池一样，有正、负电极，两极之间是电解液。
Like a battery, they use positive and negative electrodes separated by an electrolyte.
每个电池元都包括一个正电极和一个负电极，两个电极用一个浸在导电电解液中的隔离器隔开，该电解液允许离子而不是电子在两个电极之间来回传输(译者注：具体参见下面那个电池结构图)。
Each cell consists of a negative electrode and a positive electrode kept apart by a separator soaked in a conductive electrolyte that allows ions, but not electrons, to travel between them.
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