envelopen.信封;壳层;封袋
envelope cell围被细胞
envelope test静态试验
envelope star气壳星
Envelope gene包膜蛋白基因
envelope size信封大小
envelope ring包络环
envelope kiln封套窑
envelope flap信封瓣, 袋状瓣
envelope card包络,包迹
envelope seal封缄票