so, essentially, they're establishing or controlling or changing the difference between the charge inside the cell and the charge outside cell.

因此本质上来说，它们制造或者控制或者改变,细胞内外电荷之间的电位差。

麻省理工公开课 - 化学原理课程节选

So essentially, they regulate this action potential, and they do so by helping to establish and then control the voltage gradient within the cells.

总之本质上，它们负责调节动作电位,它们做到这一点通过协助制造,并控制细胞内的电位梯度。

麻省理工公开课 - 化学原理课程节选