( ( ( ( ( The compressions ) ( of ( a ( longitudinal wave ) ) ) ) A ) -RRB- ) ( ( are ( analogous ( to ( ( the crests ) ( of ( a ( transverse wave ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS compressions)) (PP (IN of) (NP (DT a) (JJ longitudinal) (NN wave))) (NP (NNP A)) (-RRB- -RRB-)) (VP (VBP are) (ADJP (JJ analogous) (PP (TO to) (NP (NP (DT the) (NNS crests)) (PP (IN of) (NP (DT a) (JJ transverse) (NN wave))))))) (. .)))
The compressions of a longitudinal wave A) are analogous to the crests of a transverse wave.
(ROOT (S (NP (PRP You)) (VP (VBP call) (SBAR (S (NP (NP (DT the) (ADJP (JJ high) (CC and) (JJ low)) (NNS points)) (PP (IN of) (NP (JJ transverse) (NNS waves)))) (VP (VP (VBZ crests)) (CC and) (VP (VBZ troughs)))))) (. .)))