Khn
[医][=Knoop hardness number]努普（氏）硬度值
🗣️ 情景例句
Let me describe to you more detail.
让我来向你做更详细的讲述。
It seems doesn't understand.
看起来他好像不了解。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，