Mr. Malcolm Stewart, and it looks like a personal letter.
Malcolm Stewart先生收 ,而且看来是一封私人信件。
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。