hardness

n.

坚硬；硬性；困难；冷酷

1. 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。
2. I can't open the door with hardness of stone.
   我不能打开那扇石门。
3. Their hardness was understood by the teacher.
   他们的艰难得到老师的理解。
4. No hardness could stop him from pursuing his goals.
   任何困难也阻挡不住他去追求他的目标。
5. He had slipped from hardness into affability.
   他从声色俱厉变得和颜悦色。

Hardness goes numerical
Absolute hardness: companion parameter to absolute electronegativity
Absolute electronegativity and hardness: application to inorganic chemistry
ChemInform Abstract: ABSOLUTE HARDNESS: COMPANION PARAMETER TO ABSOLUTE ELECTRONEGATIVITY
An improved technique for determining hardness and elastic madulus using load and displacement
The determination of film hardness from the composite response of film and substrate to nanometer scale indentations
Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology
An improved technique for determining hardness and elastic modulus using load and displacement-sensing indentation systems
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments
W C. Oliver, An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation, J...