n.流域；分水岭；转折点
Zhifanggou Watershed of Ansai is taken as a case study in this paper. 文章试以安塞纸坊沟流域为例，通过航片解译分析流域土地利用现状。
The Great Dividing Range is Australia's main watershed. 大分水岭是澳大利亚的主要分水岭。
The mountain is the watershed of the two rivers of the Yangtze and Qiantang. 黄山是长江和钱塘江两大水系的分水岭。
Leaving her first job was a watershed in her life. 辞去她的第一份工作是她生活中的一个转折点。
