| 例句 |
noun It will soon be possible to design materials that approach the hardness of diamonds. I started thinking about the hardness and toughness of life. Others may match her mental hardness; nobody will surpass it. These men enjoy the hardness of the work. hardness of heart硬心肠 He's honest and forthright, but there is that hardness about him that's needed. The hardness of the questions varied a lot. They want to be sure of the hardness of the data. water hardness水的硬度 |