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An especially prolonged radio broadcast, usually as a fund-raising event for a charity or cause.
1950s; earliest use found in Coschocton (Ohio) Tribune. From radio + -thon, after telethon.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。