D-usninic acid
[化] 右旋地衣酸
🧩 词语组成解析
🗣️ 情景例句
The old library building on Chestnut Street,
Chestnut街老图书馆，
This restaurant serves spaghetti, but not pizza.
这家餐厅做通心粉，但是没有比萨饼。
It kept repeating the steps over and over.
蜜蜂一而再，再而三地重复它的"舞步。