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单词	acid-free
释义	acid-freeˈacid-free adjective acid-free paper and paper products do not contain acid:  Store precious photographs and documents between sheets of acid-free paper.
随便看	Sioux sip siphon sipping lid sir sire siren Sir Gawain and the Green Knight Sirhan Sirhan Sir Humphrey sirloin sirocco sis sisal Sissinghurst sissy sister sisterhood sister-in-law sisterly Sistine Chapel Sisulu, Walter Sisyphus sit sitar

英语词典包含52748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。