IRB=industrial reference black 工业基准黑IRabbr.信息检索(=information retrieval)irrigating water column灌溉水柱irrelevancy elimination不相关消失IR-transmission glass透射红外玻璃irreversibility factors不可逆因子iritis of Doyne guttate多英点状虹膜炎irrigation canal system灌渠系统IR early warning system红外预警系统irrotational vibrations无旋振动irrigation civilization灌溉文明irrigation water ration灌溉用水定额