短语 as to 的意思是“就……而论”，“至于”，“说到”。它用于引入话题，表示关于某件事或某个人的讨论。

常用口语句子

• He was uncertain as to which road to take.
             译文：至于走哪条路，他还不确定。

• As to Jack, I believe he wouldn't have said anything like that.
             译文：至于杰克，我相信他不会那么说的。

• There's no decision as to when the work might start.
             译文：至于什么时候开始工作，还没有决定。