iron rations

small supply of (esp tinned) food to be used only in an emergency (by troops, explorers, etc) （部队或探险人员等的）应急口粮（尤指罐头食品）.

irate, irately, IRBM, ire, Ireland, iridescence, iridescent, iridium, iris, Irish, Irish coffee, Irish setter (also red setter), Irish stew, Irishman, irk, irksome, iron, iron foundry, iron lung, iron ore, iron-grey, iron-mould (US iron-mold), ironclad, ironic, ironical, ironically, ironing, ironing-board, ironmonger, ironmongery, ironstone, ironware, ironwork, ironworks, irony, irradiate, irradicable, irrational, irrationality, irrationally,