補票 解释：
◎ 补票 bǔpiào
[buy ticket after the normaltime] 补买车票、船票等
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国语辞典补买车票、船票、电影票等。如：「在火车上补票者通常没有座位。」
英语 to buy or upgrade a ticket after boarding a train, boat etc, to buy a ticket for a show after having sat down in the theater
法语 supplément