考研英语易混淆词汇比较记81

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rational, reasonable
    rational a.理性的，区别于无理性；理智的，区别于感情用事的。    The rational thing to do was to take the sick man to a doctor.理智的做法是送病人去看医生。
    reasonable a.有道理的，公平合理的，或指人讲道理的。
    That man works very hard, so it is reasonable for him to ask for more money.那个人工作努力，所以他要求加薪是合情合理的。