割痕 : flesh cut; fresh cut; nick; score 割管螺纹刀具 : pipe threading tool; pipe-threading to .
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Use a genuine fish knife and fork if possible as they are designed to cut through the flesh but not the bones.
如果可能的话,使用一副真正的鱼刀和鱼叉,因为它们是专门设计用来切鱼肉而非鱼骨的。
Discovering how to chip stones to make a tool that would cut flesh was the moment man learned how to be an opportunist.
发现如何把石头凿成可以割肉的工具的时候,就是人类学会如何利用工具的时候。
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