water conservation function

• 水源涵养

water conservation function的用法和样例：

例句

1. Subalpine forests in Western Sichuan are an important part of water conservation forests in Southwestern China.
   川西亚高山森林是我国西南亚高山水源涵养林的重要组成部分。
2. Study on Affection of Water Resources Protection Forest to Water Quality of Miyun Reservoir in Beijing, China.
   北京密云水库水源涵养林对水质的影响研究。