Khn
[医][=Knoop hardness number]努普（氏）硬度值
🗣️ 情景例句
Good. Thank you. I'll be right down.
好，谢谢你。我马上下来。
Cheer up!
高兴起来!振作起来!
Pollution is the price we pay for an overpopulated, over industrialized planet.
污染就是我们为这个人口过密，过度工业化的星球所付出的代价。