英语词汇503怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

英汉双解词典包含3607232条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

单词	503
释义	503
随便看	protracted pain syndrome protracted reactive paranoid psychosis protracted release drug protracted splinting protracted syndrome protracted test protractedtest protracted test machine protracted tongue protracted treatment protracted typhoid fever protracted warfare Protracted withdrawal protracteth protractile protractility protraction protraction dose protraction exposure protraction of dental arch protraction radiation protractor protractor biopsy protractor dorsalis muscle protractor head