battle against pollution of environment

例句：

1. 1.The two armies were at the brink of a battle.
   两军正处于一场战役的边缘。
2. 2. The company fought bravely against the enemy.
   该公司勇敢地与敌人作战。
3. 3.The scientist battled for years to solve the mystery of the disappearance.
   这位科学家经过多年的努力，终于解开了失踪之谜。