envelope怎麽讀
音標：[ 'enviləup ]
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- envelope英語什麽意思：n.1.信封；紙袋；包封，封皮。2.殼層，外殼。3.【數學】包(絡)線；包跡。4.【航空】氣囊；【天文學】包層；【生物學】包膜，包被。短語和例子
