Zoocumarin
动物香豆素
🗣️ 情景例句
Yes, he's my brother.
是的。他是我哥哥。
One never loses anything by politeness.
有礼貌对自己不会吃亏。
The firm closed down because there wasn't enough demand for its product.
工厂关门了，因为产品供过于求。