as用作关系代词

1.〔与 such, the same, as 连用〕。 

Such men as do you harm 危害你的那些人们。 

The same book as you have 像你所有的同样书籍。 

As many children as came 所有来的孩子们。

2.那是(由)…(知道)的。

He was a foreigner, as I knew from his accent. 他是外国人，那是由他口音知道的。