Ossein
n. 骨胶原\\n[化] 骨胶原; 生胶质
🗣️ 情景例句
It's hard for some older people to take all that noise.
一些老年人没办法忍受那些噪音。
The best man stumbles.
智者千虑，必有一失。
Spring is a pretty season，
春天是一个好季节。