IRMn.检查要求手册IRabbr.信息检索(=information retrieval)irrigation subarea灌溉分区irresistable cause不可抗拒的事由IR radiation field红外辐射场iridoid glucosides环烯醚萜音irrecoverable time不能挽回的时间irnpereept ibillty不可感知性IR target tracking红外目标跟踪irrigation thought水利思想Irgun Tzvai Le'umiIR countermeasures红外对抗