( It ( ( is ( measured ( in ( terms ( of ( pounds ( per ( ( ( ( ( square inch ) ( -LRB- ( psi -RRB- ) ) ) or ) megapascals ) ( -LRB- ( MPa -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBN measured) (PP (IN in) (NP (NP (NNS terms)) (PP (IN of) (NP (NP (NNS pounds)) (PP (IN per) (NP (NP (JJ square) (NN inch)) (PRN (-LRB- -LRB-) (NP (NN psi)) (-RRB- -RRB-)) (CC or) (NP (NNS megapascals)) (PRN (-LRB- -LRB-) (NP (NNP MPa)) (-RRB- -RRB-)))))))))) (. .)))
It is measured in terms of pounds per square inch (psi) or megapascals (MPa).
(ROOT (S (NP (NNS Megapascals)) (VP (VBZ is) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NN water) (NN potential))))) (. .)))