there's pumps here, there's pumps here.

这里有泵这里也有
So, any molecules of sodium that enter this side

因此任何进入这一侧的钠离子
get efficiently pumped out through the other side.

都被高效地从另一侧泵出去了
The net effect of these two processes,

这两个过程的净效果是
diffusion on this boundary and active transport on this boundary,

在这边的渗透和在这边的主动运输
is that sodium molecules move from inside the tube to outside the tube.

使得钠离子从肾小管内向管外运动
Now, if sodium concentration is high here where is it going to go?

假如这里的钠浓度高它会向哪里运动呢
Well, there are blood vessels up here

这上边有血管
and they're going to reabsorb this sodium

它们会将钠重吸收
just by simple diffusion processes as well,

也是仅通过简单的渗透过程
so blood that's flowing through this region

因此流经这个区域的血液
is going to take all the extra sodium away.

会把多余的钠带走