grasslands草原
grasslandn.牧场;草地
grassland nature preserve草地类自然保护区
grassland nature rerserve生态草保护区
grassland tourism regions草原旅游景区
grassland contract system草地承包制度
grassland desertification草地沙化
grassland animal husbandry草地畜牧业
grassland yield estimation草原估产
Grassland agri-ecosystem草地农业生态系统
grassland resources survey草地资源调查
Grassland industrialization草产业