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长难句：They are different in that their elements are arranged differently, and each vitamin performs one or more specific functions in the body. 结构剖析：本句是由 and 连接的并列句，其中第一部分的主干为 They are different, 后面的 in that their elements are arranged differently 为状语，修饰 different. 注意：in that 后面常引导从句，与 in that 一起作状语。 核心词汇： in that 体现于，因为 specific 具体的，特定的 element 元素，因素 参考译文：它们之前的不同之处在于各自元素的排列不同，而且每种维生素在人体内承担一种或一种以上的具体功能。 | 
