Keratin
n. 角蛋白\\n[化] 角蛋白
🗣️ 情景例句
Do you want a first class, business class or economy seat?
你想要头等舱、商务舱还是经济舱？
Why don't you turn off the stupid program?
何不把无聊的节目关掉？
I felt sure I would never be able to close the case again.
我相信那箱子再也关不上了。