translation.en: As one example, in the brown layer there's a certain type of cell called a Langerhans cell -- every square millimeter of our body is jammed full of those Langerhans cells, those immune cells, and there's others shown as well that we haven't stained in this image.
translation.zh: 举个例子，在棕色层中 有一类特定细胞叫做朗格汉斯细胞， 我们身体里的每平方毫米 都充满了这些朗格汉斯细胞， 即免疫细胞， 其它细胞也有，只是未在图片中染色出来。