4. Sustainable forest management, as a dynamic and evolving concept, aims to maintain and enhance the economic, social and environmental values of all types of forests, for the benefit of present and future generations.
4. 可持续森林管理是一个动态、不断发展的概念，目的是保持和增强所有类型森林的经济、社会和环境价值，为当代和后代造福。