degree of hardness

例句：

1. 1. The material has a high degreeof hardness, making it suitable forcutting tools.
   这种材料硬度高，适合作为切割工具。
2. 2. The new car has ahigher degree of hardness than the oldone.
   新款车的硬度比旧款车高。
3. 3. The metal has a low degree ofhardness, which makes it easy toscratch.
   金属的硬度低，容易刮花。