a. consistent with or based on or using reason
a. capable of being expressed as a quotient of integers
s. having its source in or being guided by the intellect (as distinguished from experience or emotion)
a. 理性的, 合理的
n. 有理数
1. A rational decision is based on facts and logic.
理性的决定是基于事实和逻辑的。
2. She always tries to find a rational explanation for her feelings.
她总是试图为自己的感受找到理性的解释。
3. It is important to stay rational during a crisis.
在危机中保持理性是很重要的。