英语词汇not happened before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	not happened before
释义	not so— 不然 happen v — 出现 v • 发生 v • 凑巧 v • 遭到 v happen to — 碰巧 • 值 • 正好 • 罹 before — 前 • 之前 • 以前 • 先前 • 前来 • 在未 adv • 先头 • 前儿 • 早先 not — 不 • 未 • 没 • 不是 • 否 • 非 • 也不 adj • 无 • 并不 adv happen — 出 before conj — 在之前 conj before prep — 先于 prep
随便看	development reduction development refinement development regeneration development region development-related development related issues development relating development remain development Report development reporting development representative development represented by development request development requests development requirements development research center development research center development research Institute Development research Institute development responses development responsibilities development rested development restrictions development results development retailers

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。

not so—