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
The Thanksgiving Day parade is always such great fun.
感恩节的游行总是如此有趣。
At this time of the year farmers plow their fields.
在一年这时候农夫们耕作他们的土地。
Porpoises and sharks are natural enemies.
海豚和鲨鱼是天然仇敌，