Cephamycin
头霉素
🗣️ 情景例句
How wonderful! A boy or a girl?
太好了！ 男孩还是女孩？
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
Other types of bee make their nests in holes in the ground.
其他种类的蜂在地穴里筑巢。