titular
[ˈtɪtʃələ(r)]
adj.
（有）称号的;
（有）头衔的;
名义上的;
书名的;
n.
只有名义（或头衔）的人;
例句:
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the titular head of state
名义上的国家元首
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The Queen is titular head of the Church of England.
英国女王是英国国教名义上的领袖.
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He is titular head, and merely signs laws occasionally.
他是名义上的首脑，不过偶尔签字批准法律法规。
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This four-piece actually hail from the titular county.
来自BBC
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But it's not Jeremy Irons's titular king who owns that territory.
来自THETIMES
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Negasso Gidada becomes titular president; Meles Zenawi assumes post of prime minister.
来自BBC