Keratin
n. 角蛋白\\n[化] 角蛋白
🗣️ 情景例句
Did you have a good time today?
今天玩得开心吗？
No man is content.
人心是不满足的。
But suppose the earth could be covered with sensors spaced one foot apart,
假设地球上可以布满传感器，每个相隔1英尺，