“硬度”造句

硬度较低的石头磨光滑了。
The softer rock wears away.

讲硬度, 金刚钻是独一无二的.
With regard to hardness, the diamond is in a class by itself.

铅是硬度较低的金属之一.
Lead is one of the softer metals.

• #硬度