thalweg angolul

thalweg▼◼◼◼(line that connects the lowest points in a valley or river channel)
noun
[UK: θˈalweɡ] [US: θˈælweɡ]

trough [troughs]▼◼◼◻(a linear atmospheric depression associated with a weather front)
noun
[UK: trɒf] [US: ˈtrɒf]