valley

valley
/ˈvælɪ; `vælɪ/ n
1 stretch of land between hills or mountains, often with a river flowing through it 谷, 山谷（中间多有溪流）. =>illus at mountain 见 mountain 插图.
2 region drained by a river 流域
    the Nile valley 尼罗河流域.

牛津英汉双解词典