And plus, if you are not completely satisfied, you can return it to us.
并且,如果您不是百分百的满意,你可以将产品退还给我们。
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。