Knoop hardness number
[医] 努普氏硬度数
🧩 词语组成解析
努普显微压痕硬度试验仪
hardness
['hɑrdnɪs]
n. 坚硬;<物>硬性;困难;冷酷;
🗣️ 情景例句
Oh!
噢！
I know the boy whose father is a dentist.
我知道那个男孩的父亲是牙医。
why have we had no visitors from outer space yet?
那么我们为什么还未见到外层空间来访的客人呢？