conservation

名词 conservation:

1. an occurrence of improvement by virtue of preventing loss or injury or other change
   同义词：preservation
2. the preservation and careful management of the environment and of natural resources
3. (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations

1. If I may refer back to the problem we discussed, I think we shall stress on the conservation of our natural resource.
   请允许我重提我们刚才讨论过的问题，我想我们应该强调保存我们的自然资源。
2. Who discovered the conservation of energy?
   谁发现了能量守恒？
3. Most people have come to accept the need for conservation of natural resources.
   现在大多数人已认识到保护自然资源的必要。

con.ser.va.tion

n.（名词）
The act or process of conserving.
保护：保护的行为或过程

Preservation from loss, damage, or neglect:
保存：保存以避免丢失、损坏或疏忽：
例句：
Valuable manuscripts were saved from deterioration under the program of library conservation.
在图书保存计划的实施中，许多珍贵的手稿从破坏中被抢救出来

The controlled use and systematic protection of natural resources, such as forests, soil, and water systems.
保护自然资源：对森林、土壤及水利系统等自然资源的有节制的使用及系统的保护
The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.
守恒：在物理或化学变化过程中能量或质量等物理数量的维持原状

【引伸】
con.serva.tional
adj.（形容词）