translation.en: Now these two molecules differ by only one carbon atom and two little hydrogen atoms that ride along with it, and yet one of them, heptyl acetate, has the distinct odor of a pear, and hexyl acetate is unmistakably banana.
translation.zh: 那么这两个分子式的差别就在于一个碳原子 和两个与碳原子相连的氢原子， 其中的一个分子叫乙酸庚酯 带着特殊的梨味儿。 但是醋酸己酯却带来一种很明显的香蕉味儿。