Terms containing ecosystem boundary

Subject	English	Chinese
tech.	boundary ecosystem	边界生态系统
nautic., econ.	ecosystem boundary	生态系统边界
desert.	external boundary of ecosystem	生态系统的外部界限边界 (指任一生态系统的阈值，人类活动一旦超过这一阈值就能引起不可逆的生态变化)