Collogen
[医] 胶原
🗣️ 情景例句
Mid-autumn Festival is a traditional festival for family unification.
中秋节是家人团聚的传统节日。
Reckless youth makes rueful age.
虚度青春，悔恨无已。
Well, that pair looks nice. How much do they cost?
嗯，那双看来不错。多少钱？