because you're adding a lot more positive charge to it.

使得细胞内的负电荷减少
That event is called depolarization.

这一过程称为去极化
If you were standing on the cell with your magic boots

如果你穿着你的魔术靴站在细胞上
that were electrically active somehow you would experience this dramatic

有电活动发生你就会感受到
change in membrane potential.

急剧的膜电位变化
The membrane becoming a lot less negatively charged,

细胞膜所带负电荷越来越少
even positively charged.

甚至变成正电荷
That's due totally to this rush of sodium

这完全是由于钠离子通过那些
through these new channels that have opened.

新开放通道的急速内流
Well,there's a second set of channels called potassium,

还有一组通道称为钾离子通道
voltage-gated potassium channels that also open

电压门控钾离子通道也会打开
but they're slower than the sodium channels.

但是它们比钠离子通道打开的要慢