( ( ( ( ( ( ( ( heat ( and ( mass transfer ) ) ) , ) thermodynamics ) , ) combustion ) , ) ( energy systems ) ) ; )
(ROOT (NP (NP (NN heat) (CC and) (NN mass) (NN transfer)) (, ,) (NP (NNS thermodynamics)) (, ,) (NP (NN combustion)) (, ,) (NP (NN energy) (NNS systems)) (: ;)))
heat and mass transfer, thermodynamics, combustion, energy systems;
(ROOT (S (NP (NP (DT The) (NN study)) (PP (IN of) (NP (NP (NN energy) (CC and) (NN energy) (NN transfer)) (VP (VBG involving) (NP (JJ physical) (NN matter)))))) (VP (VBZ is) (VP (VBN called) (NP (NNS thermodynamics)))) (. .)))