互文是古诗文中常用的一种修辞方法。古人行文中,有时两个词本来要合在一起说的,可是为了音节和字数的限制,要省去其中一个,解释时要把两个词合起来讲。如王昌龄《出塞》“秦时明月汉时关”前边省略“汉”字后边省略“秦”字,句中“秦”“汉”互文,“明 Intertextuality is a commonly used rhetorical method in ancient poetry. In the ancient writing, sometimes two words were supposed to be combined together, but to save syllables and the number of words, one of them should be omitted. When interpreting, two words should be combined. For example, Wang Changling’s “Exit”, “Qin Shi Ming Yue Han Shi Guan” preceded the “Han” by omitting the word “Qin” and the sentence “Qin” and “Han” intertextually.