Díjūn xiànrù bāowéi, jìnxíng zuìhòu de chuísǐ-zhēngzhá.
The enemy forces, surrounded, made their last desperate struggle.
Tips
usage
垂死挣扎 can describe both literal final struggles (a dying animal, a surrounded army) and figurative ones (a failing company, a dying ideology). It always implies the struggle is futile - the outcome is already determined.