Khn
[医][=Knoop hardness number]努普（氏）硬度值
🗣️ 情景例句
My friend's a chain smoker.
我的朋友烟瘾很重。
Though thy enemy seem a mouse, yet watch him like a lion.
即使敌人小如鼠，也要防他如防虎。
And I want a large box of chalk, too.
我还要一大盒粉笔。