thalweg
英[\'tɑ:lveɪk]
美[\'tɑlˌveg]
基本释义
- n.
- 最深谷底线; 深泓; 深泓线
英英释义
Noun
1. the middle of the chief navigable channel of a waterway that forms the boundary line between states
2. a line following the lowest points of a valley