tautology/tɔ:ˈtɔlədʒɪ; tɔ`tɑlədʒɪ/ n(a) [U] saying the same thing more than once in different ways withoutmaking one's meaning clearer or more forceful; needlessrepetition 无谓的重复; 赘述.(b) [C] instance of this 重复的话; 赘言. Cf 参看 pleonasm.
牛津英汉双解词典