In their place were sheep, their white wool blotched with blue or red ink to mark them as someone's property.
取而代之的是羊群,它们白色的毛绒上星星点点的蓝色或者红色痕迹是为了区别它们各自所属的主人。
Engraving lasers do not use ink, leave a permanent mark and are generally good for the environment.
激光雕刻不使用油墨,留下永久的标记,一般对环境有益。
Without the printing ink etc traditional consumables , Low processing cost. Mark clearly, not easy to wear and tear.
无需油墨等传统印刷耗材,加工成本低且标记清晰,不易磨损。
but I mark the whole paper up with a lot of red ink if there are mistakes,
但我在批论文的时候,也会把语法错误的地方用红笔标出来,
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