英语词汇retention device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

单词	retention device
释义	retention n — 保留 n • 留用 n retention — 滞留 device n — 器 n • 器件 n • 具 n • 器材 n • 电器 n • 策略 n • 图案 n
随便看	always up for always up to date always up-to-date about always use always used condoms always use proper always using always valid always vary always very busy always very well always view always visible always visit always waiting for always wake up always walk on the always wanted always wanted to ask always wanted to meet always watches always watching always wearing always wear safety glasses always welcome

英汉双解词典包含2273206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。

retention n —