Unika尤尼卡牌照相机UNIabbr.印度联合新闻社(=United News of India)unincorporated area非建制区域；县府直辖地区unimproved airstrip未铺筑道面的简易机场uniordinal crochets单序趾钩unicellular animals单细胞动物unibus microchannel单总线微通道unidirectional wave单向波动uniphasic potential[医] 单相电位unicellular biomass单细胞生动量unipolar depression单向抑郁unintegrated system非整合系统