legitimacy
noun [ U ] uk/ləˈdʒɪt.ə.mə.si/ us/ləˈdʒɪt̬.ə.mə.si/
(LEGAL)
合法性
the quality of being legal
The lawyers expressed serious doubts about the legitimacy of military action. 律师们对军事行动的合法性表示强烈怀疑。
(REASONABLE)
合理性
the quality of being reasonable and acceptable
She challenged the legitimacy of the previous speaker's arguments. 她对前一位演讲者观点的合理性提出了挑战。