英语词汇are required to be retained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	are required to be retained
释义	required — 所需 • 必要 retained — 保留的 adj are — 是 require — 需 • 需要 • 要有 • 要求 • 必需 require v — 规定 v • 命令 v be v — 有 v • 是 v • 当 v • 存在 v • 做 v • 属 v • 乃 v • 成为 v • 乃是 v retain v — 留 v • 保留 v • 保留 v • 保持 v • 留住 v • 挽留 v • 保有 v • 存有 v
随便看	are convinced of the fact are convinced that are convincing are cooking are cooled are cooperating with are coordinated are coordinated with are coped with are copied are coping with are copyright are copyrighted by a record a record 7 times a record amount of a record decline a record high are cordially invited to join us a record increase a recording a recording studio a record in the database a record is kept a record is maintained

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。

required —