Rockwell hardness test
[机] 洛氏硬度试验
🧩 词语组成解析
n. 罗克韦尔（美国公司）；洛克威尔（姓氏）
hardness
['hɑrdnɪs]
n. 坚硬;<物>硬性;困难;冷酷;
🗣️ 情景例句
Too bad we can't bottle the sound.
不能将声音装瓶真是太可惜了。
I hope you change his plan.
我希望你改变他的计划。
and comforted by the thought of the help he was bringing to his friend,
想到能对朋友有所帮助，他感到欣慰，