A stone once believed to be impenetrable in its hardness.硬石,金刚石一种曾被认为在硬度上不可穿透的石头
Despite the hardness of his bed, he is soon sleeping soundly.虽然床很硬,他还是很快地睡熟了。
I can't open the door with hardness of stone.我不能打开那扇石门。
Their hardness was understood by the teacher.他们的艰难得到老师的理解。
详细解释
hard.ness n.Abbr. h.,H.(名词)缩写 h.,H.The quality or condition of being hard.变硬的性质或条件Mineralogy The relative resistance of a mineral to scratching, as measured by the Mohs scale.【矿物学】 相对硬度:用莫氏硬度标测量的某种矿物质的相对硬度The relative resistance of a metal or other material to denting, scratching, or bending.硬度:某种金属或其他物质相对抗压、抗划或抗折的能力