Keratin
n. 角蛋白\\n[化] 角蛋白
🗣️ 情景例句
She's worked two jobs for years.
几年来他一直同时做两个工作。
Many hands make light (or quick) work.
人多活儿轻。
Whether it be bird, fish or beast, the porpoise is intrigued with anything that is alive.
海豚对凡是活的东西都感兴趣，不管是鸟、是鱼，还是野兽。