Decacyclene
十环烯
🗣️ 情景例句
Who is it?
是谁呀？
Quite so.
的确是这样。
I must go to the grocer's.We haven't got much tea or coffee, and we haven't got any sugar or jam.
我得去一下食品店。我们的茶叶和咖啡不多了，糖和果酱也没有了。