英语词汇“pack-years”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典-复社网

单词	pack-years
释义	pack-years 原型:pack-years 是 pack-year 的复数 [网络]吸烟累积指数；吸烟史用包年；吸烟年包数
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