进入２１世纪，中国林业已进入由木材生产为主向生态建设为主的历史性重大转变。这是经济社会快速发展和人民生活不断改善对新世纪林业提出的新的更高的要求。目前，我国生态环境依然面临着局部有所好转、整体仍在恶化的严峻形势，严重制约了我国可持续发展的进程。从１９９２? In the 21st century, China’s forestry has entered a historic and major shift from being mainly timber production to ecological construction. This is a new and higher requirement for forestry in the new century set forth by the rapid economic and social development and continuous improvement of people’s lives. At present, the ecological environment of our country still faces the grim situation of partial improvement and the overall situation is still deteriorating, seriously restricting the process of China’s sustainable development. From 1992?