Khn
[医][=Knoop hardness number]努普（氏）硬度值
🗣️ 情景例句
What guarantee do I have that it won't break down easily?
有什么保障它不会轻易出故障？
Then we'd have some idea of what you'll be needing.
那么我们就会心中有点儿数，知道你们需要什么了。
torn by the noise of the taxicabs, lorries and buses, and thronged ceaselessly by great crowds.
街道上充斥着汽油味和有毒气体，出租汽车、卡车、公共汽车的噪音刺耳难忍，络绎不绝的人群挤来挤去。