holding area短语⁶⁶⁴⁶⁵ 基本例句 保存区,等候区 The purpose is to emphasis well recycling of ecology in source area, important mountain area, water resource holding area. Improve the present condition of ecology environment in our country overall. 目的在于促进源头区、重点山区、水源涵养区的生态良性循环发展，全面改善我国的生态环境状况。 cnki