translation.en: Haldane guesses that a dog would probably be able to place the acids in the order of their molecular weights by their smells, just as a man could place a number of piano wires in the order of their lengths by means of their notes.
translation.zh: 霍尔丹猜测狗狗能够根据嗅觉将两种酸的 分子量进行排序， 就好像人可以根据音符将钢琴线的长度 进行排序。