孤军奋战 (gū jūn fèn zhàn) — to fight alone (without allies or support); (figurative) to struggle single-handedly against difficulties

Definition

Examples

• 在这个项目上，他孤军奋战，没有队友帮忙。
  Zài zhè ge xiàng mù shàng, tā gū jūn fèn zhàn, méi yǒu duì yǒu bāng máng.
  On this project, he fought alone without teammates to help.
• 创业初期，他每天加班到深夜，真是孤军奋战。
  Chuàng yè chū qī, tā měi tiān jiā bān dào shēn yè, zhēn shì gū jūn fèn zhàn.
  In the early days of starting his business, he worked overtime until late every night — truly fighting a lone battle.
• 面对强大的竞争对手，他们只能孤军奋战。
  Miàn duì qiáng dà de jìng zhēng duì shǒu, tā men zhǐ néng gū jūn fèn zhàn.
  Facing powerful competitors, they could only fight alone.