古今异义词,是指文言文中的词语或短语与现代汉语中的词语或短语字面相同而意义和用法不同的语言现象。一般分为单音节、双音节和多音节古今异义词,其中以双音节古今异义词数量最多。古今词义和用法的差异,一直是学生学习文言文的一大障碍, The ancient and modern ancestry refers to the linguistic phenomenon that the words or phrases in the classical Chinese are literally the same as the words or phrases in modern Chinese while the meaning and usage are different. Generally divided into monosyllabic, disyllable and polysyllabic ancient and modern synonyms, of which the largest number of disyllabic ancient and modern allusions. The difference between ancient and modern meaning and usage, has been a major obstacle for students to learn classical Chinese,