钻石是永恒的，它极高的硬度也是不会变的。
钻石硬度的秘密在于它的原子排列。
The secret to a diamond's hardness is its atomic arrangement.
如果要检测硬度，陨石的标本就太小，它只能显示出这种物质无疑比一般钻石硬。
The sample from the meteorite was far too small to test for hardness, except to show that it is certainly harder than regular diamonds.
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