late 14c., "pertaining to reason;" mid-15c., "endowed with reason," from Old French racionel and directly from Latin rationalis "of or belonging to reason, reasonable," from ratio (genitive rationis) "reckoning, calculation, reason" (see ratio).
实用例句
1. All your arguments presuppose that he's a rational, intelligent man.
你所有论点的前提都是他是一个理性而聪明的人。
来自柯林斯例句
2. The arrangement presumes that both lenders and borrowers are rational.
这一协议假定借贷双方都是在神志清楚的状态下签订的。
来自柯林斯例句
3. He was rational and consistent in the conduct of his affairs.
他处理私事时头脑清楚，始终如一。
来自柯林斯例句
4. Did he come across as a sane rational person?
他看起来是一个正常而理智的人吗？
来自柯林斯例句
5. The alphabet might be more rational if all the vowels came first.