来自《耶鲁大学开放课程：生物医学工程探索第5集第5集》

Hemoglobin, as you know, is an oxygen carrier

众所周知血红蛋白可以携带氧气
and so red blood cells concentrate in bags of hemoglobin

含有大量血红蛋白的红细胞
which circulate in your blood and they carry oxygen.

在全身循环以携带氧气
Well, it was not very

我可以很容易的画出
hard for me to draw this red blood cell here,

一个血红细胞
it's just an oval, and one reason I draw it like an oval,

就画个椭圆足矣
is that that's basically what it looks like if you look at it.

因为它看上去就是这个样子的
One of the most obvious things about a red blood cell

红细胞最为明显的不同就是
is it doesn't have nucleus,

它是无核的
it has no nucleus.

它没有细胞核
Red blood cells are terminally differentiated cells.

血红细胞是一种终末分化细胞
They have become as different as they can be.

它们已经几近分化之能事