英语词汇is not optional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	is not optional
释义	is not— 不是 • 未有 not so— 不然 optional — 任择 adj • 可选的 adj • 选配 adj • 选购 adj • 自选 not — 不 • 未 • 不是 • 无 • 非 • 没 • 并不 adv • 否 • 也不 adj
随便看	our notification our number our number one priority our objections our objective our objective has always Ben our objective is to investigate our objectives are our objective was our objective was to enable our obligations our offer comprises our offer covers our offer for our offer includes our offerings include our office our office closed our office is located our office locations our offices are based our offices are located our offices are open our old friend our ongoing

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。

is not—