日夜兼程的意思：
不分白天黑夜拼命赶路
英文解释
press forward day and night alike (without halting to rest);by forced marches day and night;ride day and night, and take no rest;travel day and night ;
出处：袁静《伏虎记》第四回：“第一批中国人民志愿军平山部，日夜兼程开到东北某地。”
示例：
1.战争年代，战士们行军常常是日夜兼程。
2.在这万分紧急的关头，几十万解放军官兵日夜兼程，朝着大江挺进。——苏教版五年级语文下册23课《大江保卫战》
用法：作谓语、宾语、状语;指赶路很匆忙。
双语例句
看看公路上那些运马人，在通往市集的路上日夜兼程;难道他的内心里还有什么神圣在活动?
Look at the teamster on the highway, wending to market by day or night; does any divinity stir within him?
长征日夜兼程
他们日夜兼程的在操蛋的路上开着车，炮弹不断地在身边爆炸，但他们从不停止，从不动摇自己的决心。
All day and all night they rolled over those son-of-a-bitching roads, never stopping, never faltering from their course, with shells bursting all around them all of the time.
他们将日夜兼程。
They will travel by night as well as by day.