名词短语
中文翻译：钻石穿透硬度
同义词：
['diamond hardness', 'diamond penetration hardness']
例句：
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1. Thediamond is the hardest substance known to man.
钻石是已知的人类最硬的物质。
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2.The diamond penetrator was used to test the strength of the material.
钻石穿透器被用来测试材料的强度。
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3.The diamond penetrator was used to drill a hole in the rock.
钻石穿透器被用来在岩石中钻一个洞。