Environmental Population and Organismic Biology环境的人口和生物有机体 Electronic Post Office Box电子邮局盒子 Employee Per Occupied Bed (hospital accounting)雇员/占领床(医院的会计) Department of Environmental, Population, and Organismic Biology (University of Colorado, Boulder, Colorado)环保部门,人口、生物有机体,科罗拉多大学、美国科罗拉多州博尔德