preservation
n
保存；保管
The old building is in good preservation.
這棟舊建筑保存得很好.
保持；維持
the preservation of world peace
維持世界和平
conservation
n.
The act or process of conserving.
保護(hù)的行為或過程
Preservation from loss,damage,or neglect:
保存保存以避免丟失、損壞或疏忽：
Valuable manuscripts were saved from deterioration under the program of library conservation.
在圖書保存計劃的實施中,許多珍貴的手稿從破壞中被搶救出來
The controlled use and systematic protection of natural resources,such as forests,soil,and water systems.
保護(hù)自然資源對森林、土壤及水利系統(tǒng)等自然資源的有節(jié)制的使用及系統(tǒng)的保護(hù)
The maintenance of a physical quantity,such as energy or mass,during a physical or chemical change.
守恒在物理或化學(xué)變化過程中能量或質(zhì)量等物理數(shù)量的維持原狀
其實這兩個詞意思及其相近 互換幾乎沒什么問題 上面的例子可以幫助你了解其中細(xì)微差異