Hardmeter
硬度计
🗣️ 情景例句
I'm a foreign student, and I'd like to make some new friends.
我是个外国学生， 我想交几个新朋友。
The physician said smoking is harmful to my health.
医生说了吸烟对我的健康有害。
What is it about?
这是关于什么的？