Yuglon
5-羥基-1, 4-萘二酮
??? 情景例句
I'm about to go to the Post Office.
我正要去郵局。
Is he coming to dinner?
他回來吃飯嗎？
What a relief it was when the boulders suddenly disappeared, giving way to a stretch of plain where the only obstacles were clumps of bushes.
突然大石塊不見了，前面是一片平地，唯一的障礙只有一簇簇灌木叢。這使我們長長地松了口氣。