source zone

例句：

1. 1. The city's water sourceis located in the mountainous region.
   该市的水源位于山区。
2. 2. Theresearch team focused on studyingthe ecology of the sourcezone.
   研究团队专注于研究水源区的生态。
3. 3. The government has been working to protectthe source zone from pollution.
   政府一直在努力保护水源区免受污染。