The electrons travel through, say, a light bulb, and then return to the battery at the positive terminal, where they're accepted by manganese dioxide.

电子穿过灯泡之类的用电器，然后回到电池正极，被二氧化锰接收。

In here elemental zinc is going to react with manganese dioxide, also known as manganese four oxide, to produce manganese three oxide and zinc oxide.

在这里元素锌将与二氧化锰（也称为四氧化锰）反应生成三氧化锰和氧化锌。