( ( The wavelength ) ( ( is ( ( the distance ) ( between ( ( two ( adjacent troughs ) ) ( for ( the ( same wave ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN wavelength)) (VP (VBZ is) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (NP (CD two) (JJ adjacent) (NNS troughs)) (PP (IN for) (NP (DT the) (JJ same) (NN wave))))))) (. .)))
The wavelength is the distance between two adjacent troughs for the same wave.
(ROOT (S (NP (NNP Wavelength)) (VP (VBZ is) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (NP (CD two) (JJ corresponding) (NNS points)) (PP (IN of) (NP (NP (JJ adjacent) (NNS waves)) (VP (VBN called)))))))) (. .)))
Wavelength is the distance between two corresponding points of adjacent waves called.