adv.不合理地,无理性地;
例句:
Superstition may cause people to behave irrationally.
迷信可能会让人丧失理智.
The market is behaving irrationally.
市场已失去了理性。
They reacted irrationally to the challenge of Russian power.
他们对俄军的挑衅做出了很不理智的反应.