ra·tion·ale /ˌræʃəˈnɑːlɪ；-ˈnæl/ n. 1. 原理的阐述，理由的说明，解释 2. 全部理由，根本原因，逻辑依据 It is the rationale for comprehensive schools. 这就是设立综合中学的全部理由。 I will put before the public what our foreign policy is and explain its rationale. 我愿将我国外交政策的内容公诸于众，并说明其依据。 There seems to be no rationale to his behaviour. 他的行为似乎不合理性。 [NL < L ratiōnālis rational]