1N-COUNT (学校的)招生地区;(医院等的)服务地区 The catchment area of a school, hospital, or other service is the area that it serves. (学校的)招生地区;(医院等的)服务地区 [British]
...the catchment areas of the district general hospitals. [+ of]
地区综合医院的服务范围
2N-COUNT (地理学上河流的)集水区域，汇水面积 In geography, the catchment area of a river is the area of land from which water flows into the river. (地理学上河流的)集水区域，汇水面积 [technical]