Most fish, though, maintain a different internal salt concentration than their surroundings.

然而，大多数鱼体内的盐浓度与周围环境不同。

And since the fresh water doesn’t match up with your internal salt concentration, there’s an uncomfortable feeling as they try to equalize and the water flows into your cells.

由于淡水与您体内的盐浓度不匹配，因此当它们试图平衡并且水流入您的细胞时会有一种不舒服的感觉。