尽管青铜器和石器还在继续被使用，但青铜在用于制造带有锋利边缘的物件方面要成功得多，这可以应用于从锯子、镰刀到武器等任何东西。
Although copper and stone tools continued to be used, bronze was far more successful in creating sharp edges that could be used as anything from saws and scythes to weapons.
这雄鱼离钓索好近，老人生怕它会用它的尾巴把钓索割断，这尾巴象大镰刀般锋利，大小和形状都和大镰刀差不多。
He had stayed so close that the old man was afraid he would cut the line with his tail which was sharp as a scythe and almost of that size and shape.
与死神镰刀一样锋利的刀刃。
与死神镰刀一样锋利的刀刃。
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