资源环境使用强度
resources and environments use intensity
环境的非使用性价值
non-use values of the environment
使用者环境测试软件包
user environment test package
UETP
循环使用
cycle use
recycle use
recycling use
circulating use
recycling usage
oxidation and recy-cling use
oxidation and recycling use
reuse
recycle
Recycling
three agricultures problem
reclamation