IRMn.检查要求手册IRabbr.信息检索(=information retrieval)irradiated flavour照射味irrgate the fields浇地IR scene projector红外景像生成器irrepressible urge压抑不住的愿望irrotational field无旋场,非旋场irrigation feature灌溉特点irrigation tobacco灌溉烟草irrigation modulus灌水率（灌水模数）irgin reproduction单性生殖irreducible number不可约数