( ( In ( ( more simple ) terms ) ) ( , ( ( the pH ) ( ( ( is simply ) ( ( a measure ) ( of ( ( the ( ( acidity or ) alkalinity ) ) ( of ( a solution ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (ADJP (RBR more) (JJ simple)) (NNS terms))) (, ,) (NP (DT the) (NN pH)) (VP (VBZ is) (ADVP (RB simply)) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN acidity) (CC or) (NN alkalinity)) (PP (IN of) (NP (DT a) (NN solution))))))) (. .)))
In more simple terms, the pH is simply a measure of the acidity or alkalinity of a solution.
(ROOT (S (NP (NP (DT The) (NN acidity)) (PP (IN of) (NP (DT a) (NN solution)))) (VP (VBZ is) (ADVP (RB typically)) (VP (VBN assessed) (ADVP (RB experimentally)) (PP (IN by) (NP (NP (NN measurement)) (PP (IN of) (NP (PRP$ its) (NN ph.)))))))))