双壳纲 shuāngkégāng Bivalvia Definitions Defs Origin Strokes Stroke Words Sentences Sents 双 雙 shuāng numeraladjective two Two; both; dual; twin; double; twofold壳 殼 ké noun shell The hard outer covering of something, such as an egg, nut, or crab; also refers to a casing, housing, or shell of a machine or device.纲 綱 gāng class A level in biological classification, ranking below phylum (门 mén) and above order (目 mù)
