Eumelanin
真黑素
??? 情景例句
They concluded that the goods were of good quality and proved no problem.
他們斷定貨物質地優良，并證明沒有任何問題。
Seize (or Take) time by the forelock.
撤熱打鐵。
We had a very nice time.
我們過得非常愉快。