英语词汇“optional”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	optional
释义	optional [ˈɒpʃənl] CET4CET6TEM4考研GRETOEFLIELTS j5763 4558 112 78 2576 1266 526 任选的(100%) adj.可选择的，随意的 n.选修科目
随便看	steam accumulator, heat accumulator steam accumulator, heat accumulator nuclear propulsion steam accumulators steamactivated steam activation steam admission steam admission lead steam admission nozzle governing steam admission side steam-admission side steam-admission slit steam admission throttle governing steam admission valve steam-admission valve steam admitted above the piston steam admitted below the piston steam aerosol generator steam-age steam age steam ageing steam ager steam aging steam-agitated autoclave steam ahead steamair activation

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