Zhànshìmen kào gānliáng hé shuǐ jiānchí le sān tiān.
The soldiers held out for three days on dry rations and water.
Tips
culture
Traditional 干粮 includes things like 馒头 (steamed buns), 烙饼 (flatbread), 炒面 (parched flour), and 锅盔 — foods designed to keep without refrigeration. Modern usage extends to anything portable: instant noodles, biscuits, energy bars.
usage
干 here is gān (1st tone, 'dry'), not gàn ('to do'). In traditional script the dry sense is written 乾, hence the traditional form 乾糧.