Hardmeter
硬度计
🗣️ 情景例句
We'll be looking for your book.
我们会去买你的书。
It is good fishing in troubled waters.
混水之中好摸鱼。
And you ought to get a few large rocks to put in the tank.
还有，你应该弄到几块大点儿的岩石，放进水箱里。