英语词汇to be 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	to be optional
释义	optional — 任择 adj • 可选的 adj • 选配 adj • 选购 adj • 自选 be v — 有 v • 是 v • 做 v • 存在 v • 当 v • 属 v • 成为 v • 乃 v • 乃是 v option n — 方案 n • 选择 n • 选修课 n • 可选择的事物 n • 选择权 n • 购买权 n option — 选择 • 期权
随便看	leave rubbish leave rules leaves leaves a choice leave safety leaves a good impression leave salary leaves and seeds leaves and stems leaves an imprint leaves a permanent scar leaves are changing leaves are falling leaves aside leaves a space leaves a trail of leaves a void leaves a wife and children leaves behind leave sb far behind leave sb in the lurch leave scars leaves change colors leave scheme leave school

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。

optional —