Collagens
(collagen 的复数) n. 胶原\\n[化] 骨胶原; 胶原
🗣️ 情景例句
They don't have a coffee shop.
他们也没有咖啡厅。
How long have you studied English?
你学英语多久了？
There is a new type of machine which can produce colour copies.
有一种新型的机器能够制作出彩色复印件。