They're red because they contain a special protein called hemoglobin which is very concentrated inside the cell.

红细胞的红色源于,其内部一种叫做血红蛋白的特殊蛋白质,血红蛋白在细胞内的浓度很高

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One example of a very different cell is a red cell or red blood cell, these are the cells that give blood it's red color.

举个高度分化细胞的例子,红细胞,或称血红细胞,它们赋予了血液鲜红的色彩

耶鲁公开课 - 生物医学工程探索课程节选

Red blood cells are terminally differentiated cells.

血红细胞是一种终末分化细胞

耶鲁公开课 - 生物医学工程探索课程节选

Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.

我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的

耶鲁公开课 - 生物医学工程探索课程节选

In a normal cell DNA that DNA in the normal cell - this DNA gets cut by the restriction enzyme, so the sickle gene ends up - so that hemoglobin gene ends up in two pieces.

一个正常细胞的DNA,正常细胞里的DNA,会被限制酶所剪切,因此镰状血红蛋白基因--,不对,是正常血红蛋白基因被切成两段

耶鲁公开课 - 生物医学工程探索课程节选