In 1996, the team uncovered antelope, horse, and other mammal bones showing the telltale cut marks of stone tools-at 2.5 million years, one of the earliest signs of tool use.

1996年，研究小组在此出土了带有石制工具切痕迹象的羚羊骨、马骨和其他哺乳动物的骨骼，其年代要回溯至250万年前，这是古人类有使用工具迹象的最早时期。

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In many cases of stainless steel cutting operations with carbide tools, a tool life strongly depends on flank notch wear of depth of cut rather than average flank wear of main cutting edge.

硬质合金刀具在不锈钢加工中，其刀具耐用度主要是取决于后刀面边界磨损而不是主切削刃后刀面的平均磨损量。

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NC flame cutting: CNC flame cutting is numerical control machine tool use gas with oxygen or gasoline in metal materials with oxygen cut a way to cut.

数控火焰切割：数控火焰切割是数控机床利用燃气配氧气或者汽油配氧气进行金属材料切割的一种切割方式。

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Two hours later, my hands cut and bruised, my e-tool in ruins, I stopped.

CNN: Digging in with the Marines