英语词汇has it been necessary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	has it been necessary
释义	necessary — 必要 • 必须 adj • 必要的 adj • 所需 adj • 必需 adj • 不可或缺 has-been — 过气 it pron — 它 pron IT — 信息技术 • 技术情报 necessary n — 需要 n
随便看	backside backside coating back side contact backside-illuminated sensor backside illumination backside illumination sensor back side image back side of the paper backsides backside wear back signal back siphonage back skin back skull backslash backslash escapes back slightly back slit backs of a Chair backs of fingers back solution back soon Backspace Backspace backspace delete

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。

necessary —