Homovanillin
高香草醛, 3-甲氧基-4-羥基苯乙醛
??? 情景例句
How'd you guess?
怎么曉得？
Friends (the best of friends) must part.
好友終有分手時。
Let us do it by ourselves，will you?
我們自己做這件事，可以嗎？