They are all filed alphabetically under author.

　　它們都是在作者一欄下面按字母順序來歸檔的。

　　The books are arranged alphabetically by author.

　　這些書是按作者姓名字母順序排列的。

　　The author has settled for a more academic approach.

　　該作者已經確定了一種更學術的方法。