Look at both sides of the case and come to a rational decision.看看问题的正反两面, 再理性决策。

the power of rational thought理性思维的力量

Rachel looked calmer and more rational now.这会儿雷切尔似乎平静一些, 也理智一些了。

The voice sounded perfectly rational but what it was saying was completely mad.听声音倒是再清醒不过, 说的内容却全是胡言乱语。