请各位老师帮我解决一下下面的句子,学生感激不尽.
(Allthatamanhastosayordothatcanpossiblyconcernmankind),isinsomeshapeorothertotellthestoryofhislove-tosing,andifheisfortunateandkeepsalive,hewillbeforeverinlove我想问一下,我所括号里面的这两个that中,第二个that是启啥作用的呢?