The enemy attacked our defenses but they weren't able to break through.敌人攻击我们的防线，但未能冲破。

The enemy finally broke through our defenses and defeated us.敌人最终突破了我们的防线，击败了我们。

The prisoners broke through the wall and escaped.囚犯们冲出围墙越狱逃跑了。

The organization is committed to breaking through the barriers of poverty.这个组织致力于打破贫穷壁垒。

The sun finally began to break through. = The sun finally began to break through the clouds.阳光终于透过云层照射出来。