### Chinese: 青海三江源地区是我国乃至亚洲重要的生态屏障和水源涵养区，而青海湖是控制西部荒漠化向东蔓延的天然屏障和生态功能区。
### English: Qingdao is an important ecological barrier and water resource coverage area in China and even Asia, while Qingdao Lake is a natural barrier and ecological functional area that controls the spread of desertification <v>in</v> the west to the east.

### Improved English: Qinghai three-rivers area is an important ecological barrier and water conservation area in China and even Asia, and Qinghai Lake is a natural barrier and ecological function area to control the eastward spread of desertification in the west.
