Core hardness
[机] 砂心硬度
🧩 词语组成解析
core
[kɔ:]
n. 中心，核心，精髓;果心，果核;[地质学]地核;[计] 磁心;
vt. 去（果）核，挖去…的果心;提取岩芯（样品）;
hardness
['hɑrdnɪs]
n. 坚硬;<物>硬性;困难;冷酷;
🗣️ 情景例句
I suggest that you tear up the letter and start over again.
我建议你把信撕掉重新再写。
Health and understanding are the two great blessing of life.
健康和融洽是人生两大幸事。
At the age of eight, he joined a group of child dancers.
8岁时参加了儿童舞蹈团。