translation.en: And the plot really thickens when you realize that, unlike other pleistocene tools, the hand axes often exhibit no evidence of wear on their delicate blade edges.
translation.zh: 更复杂的是当你考虑到， 不像其他更新世的工具， 在这些手斧 精美脆弱的刀刃边缘 找不到任何磨损的痕迹。