or recovered in the distal tubule and the collecting tubules.

被清除或者重吸收了
Urea, which has this pattern here, a lot reabsorbed

尿素的代谢方式是这样的很多被重吸收了
but then it comes back out again, and then it's reabsorbed finally.

但然后它会再出来然后它才最终被重吸收
Now, some of these things are going to be hard for you

现在这其中的某些部分
to understand why they go in and out.

你们会觉得很难理解它们为什么出出进进
It has to do with this complex interplay

这和我前面提到过的
that I mentioned before between processes

在肾小管不同部分间
that are happening in different parts of the tubule,

复杂的相互作用有关
establishing gradients that are then used

浓度梯度也在不同的部位
in different portions to aid in reabsorption.

被用于加强重吸收
How do these things happen?

这些是如何作用的呢
How is sodium, for example,

举例来说钠是如何