Procollagen
原骨胶原
🔁 扩展释义
【化】 前胶原
🗣️ 情景例句
I have to return this book to the library.
我得把书还回图书馆了。
Do you work near the library?
你在图书馆附近工作吗？
Do you usually buy in large quantities?
你们的订购量通常都很大吗？