The CPE specifically targets the tight junctions that connect epithelial cells lining the intestines to one another.

毒素（CPE）作用于肠上皮细胞之间的紧密连接。

The third section is called the ileum, and it has tight intercellular junctions, allowing it to efficiently absorb fluid and begin concentrating the intestinal contents.

第三部分为回肠，有紧密的细胞间链接，使得回肠可以高效地吸收液体，浓缩肠内容物。