英语词汇optional elements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	optional elements
释义	optional elements supplementationn. 增补；补充；追加 complementationn. 互补；补足语
随便看	Sphaerophysa Sphaerophysa salsula sphaerophysine Sphaerophysine Benzoate Sphaeropleaceae Sphaeropleales Sphaeropleineae sphaeroprotein Sphaeropsidaceae sphaeropsidaceous sphaeropsidale Sphaeropsidales sphaeropsidin sphaeropsis aucubi fukui Sphaeropsis malorum sphaeropsocid sphaeropsocids Sphaeropteris sphaerosiderite sphaerosiderites sphaerosome Sphaerospora sphaerospore sphaerosporella brunnea sphaerospores

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