英语词汇been a challenge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	been a challenge
释义	challenge n — 挑战 n • 质疑 n • 难题 n challenge v — 挑战 v • 质疑 v • 怀疑 v be v — 有 v • 是 v • 当 v • 做 v • 存在 v • 成为 v • 属 v • 乃 v • 乃是 v challenge — 将军
随便看	at least $30 trillion. at least $30 trillion. at least 3 4 of the votes at least 3 years at least 40 years old at least 4 characters at least 4 persons at least 4 weeks at least 4 weeks before. at least 4 weeks notice at least 50,000 years ago at least 50,000 years ago at least 50,000 years ago at least 500 pixels at least 58 countries at least 5 characters at least 5 days before at least 5 years at least 5 years as of at least 5 years experience at least 6 characters at least 6 months at least 6 pages at least 6 weeks at least 7 working days

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。

challenge n —