conservation
英 [k?ns?'ve??(?)n]
美[,kɑns?'ve??n]
- n. 保存，保持；保護(hù)
英英釋意
- 1. an occurrence of improvement by virtue of preventing loss or injury or other change
- 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