守恒

例句：

1. 1. The law of conservation of energy states that the total amount of energy cannot be created or destroyed.
   能量守恒定律表明，能量总量不能被创造或销毁。
2. 2. In physics, conservation of momentum is a fundamental principle that states that the total momentum of an objectcannot change.
   在物理学中，动量守恒是一条基本原理，它表明一个物体的总动量不会改变。
3. 3.The conservation of resources is crucial for sustainable development.
   资源的保护对于可持续发展至关重要。