長難句：They are different in that their elements are arranged differently, and each vitamin performs one or more specific functions in the body.

結構剖析：本句是由 and 連接的并列句，其中第一部分的主干為 They are different, 后面的 in that their elements are arranged differently 為狀語，修飾 different. 注意：in that 后面常引導從句，與 in that 一起作狀語。

核心詞匯： in that 體現于，因為
specific 具體的，特定的
element 元素，因素

參考譯文：它們之前的不同之處在于各自元素的排列不同，而且每種維生素在人體內承擔一種或一種以上的具體功能。