请高手帮忙翻译一下下面的句子!多谢!It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it.

请高手帮忙翻译一下下面的句子!多谢!
It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it.

这个,据他所知,去楼下是唯一的办法,但是有时他觉得有另一种办法,如果他可以停止撞击在那一会儿、和想一下它.