It's just the matter of the schedule,that is,if it is convenient of you right now.
如果你们感到方便的话,我想现在讨论一下日程安排的问题。
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。