rational
adj
1 able to reason 能推理的: Man is a rational being. 人是有理性的生物.
2 not foolish or absurd; sensible; reasonable 出於理性的; 理智的; 明事理的; 讲道理的
rational conduct 合理的行为
a rational argument, explanation, solution, etc 合乎情理的论证、 解释、 解决方法等.
3 lucid or sane 头脑清醒的; 神志正常的
Despite her recent stroke, she is quite rational. 她尽管最近曾患中风, 但头脑仍很清醒.
No rational person would go to work in his pyjamas. 任何神志正常的人都不会穿著睡衣去上班.