谁把这锯子的一个齿弄断了?。

Who broke a tooth of this saw?

我刚开始使用的工具是简单的锤子、刨子、锯子等。

The tools I originally had were simple ones, such as hammers, planes and saws.

我们在水下向上看着冰面。一把锯子锯开冰面，直冲着我们过来。

We're underwater looking up at it. A saw cuts through, heading right for us.

这些骨头有锯子的痕迹，另外，部分头盖骨被穿洞，还有部分的骨头被挖去。

They bore the marks of saws and some of the skulls had drill holes and portions of the bone cut out.

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.