that there's more covered than just renal physiology there.

这一章不单只有肾脏生理学
It also talks about biotransformations

其中还涉及到生物转化
and the role of the liver in getting rid of substances.

和肝脏在代谢方面的作用
We're not going to cover that part in class

我们在课上不会去讨论那部分内容
but I encourage you to read it as a whole

但我还是鼓励你们去完整地读一下
to get a broader perspective of how kidney function

从而能更全面地了解肾功能
fits into the overall ability of your body to maintain

以及它在维持整个机体稳态
what we call homeostasis or a constant environment.

或内环境的稳定中所起到的作用
As I talked about last time,one of the important elements

正如上次课上我所提到的
of this constant environment is to maintain sodium,potassium, bicarbonate,

内环境中最重要的是将钠钾碳酸氢盐
and the levels of other key molecules at a constant level

和其它主要分子在每一天甚至一生中
throughout the day and throughout your life.

都维持在一个恒定的水平