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catchment area

noun
🔊/ˈkætʃmənt eəriə/
🔊/ˈkætʃmənt eriə/, 🔊/ˈketʃmənt eriə/
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  1. the area from which a school takes its students, a hospital its patients, etc.（学校的）招生地区；（医院等的）服务地区Topics Educationc2
  2. (also catchment)
     (specialist) the area from which rain flows into a particular river or lake汇水区；汇水面积