The leathery, undeteriorative, and almost indestructible quality was an inherent attribute of the thing's form of organization, and pertained to some paleogean cycle of invertebrate evolution utterly beyond our powers of speculation.

这种坚韧不破不可摧毁的特质是该物质结构的内在特征之一，属于无脊椎动物进化过程的某种第三纪周期，远非我们的推断力所能及。