来自《耶鲁大学开放课程：生物医学工程探索第16集第16集》

This filtration does not directly produce urine.

过滤不直接产生尿液
You know what the problem with that is,

你知道问题在于
it's you'd have to produce too much urine

如果只是过滤的话
if that was the only thing that happened.

你将不得不产生过多量的尿液
Instead, the kidney reabsorbs,

然而肾脏会进行重吸收
so after the filtration step it takes the fluid

因此在过滤这一步后面
that's produced by filtration and it looks at that fluid

肾脏在检查过滤后的液体中
and it decides what things the body can use,

有些什么是身体可以利用的
water, glucose, sodium, potassium,

水葡萄糖钠盐钾盐
and it reabsorbs them back into the blood.

肾脏再将它们重吸收至血液
Filtration is the first function,

过滤是第一个功能
re-absorption is the second function.

重吸收是第二个功能