五碳糖 [ㄨˇ ㄊㄢˋ ㄊㄤˊ; wu3 tan4 tang2] pentose (CH20)5, monosaccharide with five carbon atoms, such as ribose 核糖[ㄏㄜˊ ㄊㄤˊ; he2 tang2] ◄ ►