英语词汇“pack-year”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	pack-year
释义	Word Frequency pack-year noun a measure of the amount of cigarettes a person has smoked over an extended period, equal to one packet of 20 every day for one year
随便看	retroviral retrovirus retry retsina retted rettery retting retund retune returf return returnability returnable return crease returned man returned soldier returnee returner return fare return flight return half returnik returning officer return journey return key

英语词典包含233703条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。