Their nasal glands have the function of individual recognition.

它们的鼻腺有个体识别的功能。

Fish produce large numbers of tiny young, and adults exhibit about as much individual recognition of their offspring as humans do for a handful of raisins.

鱼类生产大量的、个体小的幼体，且成年的鱼识别它们自己的后代就和我们识别一把葡萄干一样差劲。