物质通常是不带电的，就是说，它的质子和电子数量是相等的。（宾语译成主语）

Matter is usually electrically neutral, that is, it has as many protons, as electrons.

youdao

物质通常是不带电的，就是说，它的质子和电子数量是相等的。（宾语译成主语）

Matter is usually electrically neutral, that is, it has as many protons, as electrons.

youdao