Sure. Can you give me fifty dollars in small bills, please, and ten dollars in change?
好的。你可以帮我把50块钱换成小钞,10块换成零钱吗?
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此,尽管制造这些工具的人的骨头早已荡然无存,但远古时代的石头工具却保存了下来。