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.
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。