illegitimate
[ˌɪlɪˈdʒɪtəmɪt]
adj.
非婚生的，私生的;
法律不容的;
（指辩论等的结论）不合逻辑的;
n.
非嫡出子;
例句:
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They represented a ruthless and illegitimate regime that could not remain forever.
他们代表了一个残暴的非法政权，这样的政权是不可能长久的。
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illegitimate use of company property
不正当使用公司财产
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It is quite illegitimate to argue that the government had no choice.
辩称政府别无选择是十分不当的.
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We're going to have lots of illegitimate claims.
来自WSJ
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Rutherford offered suggestions concerning illegitimate acts of the state.
来自NEWYORKER
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Did you think the court's demand was illegitimate?
来自NEWYORKER