( ( With ( ( further addition ) ( of heat ) ) ) ( , ( ( the temperature ) ( ( ( remains constant ) ( while ( ( the ( phase transition ) ) ( takes place ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN With) (NP (NP (JJ further) (NN addition)) (PP (IN of) (NP (NN heat))))) (, ,) (NP (DT the) (NN temperature)) (VP (VBZ remains) (ADJP (JJ constant)) (SBAR (IN while) (S (NP (DT the) (NN phase) (NN transition)) (VP (VBZ takes) (NP (NN place)))))) (. .)))
With further addition of heat, the temperature remains constant while the phase transition takes place.
(ROOT (S (PP (IN During) (NP (NN phase) (NN change))) (, ,) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (DT a) (NN system)))) (VP (VBZ remains) (ADJP (JJ constant))) (. .)))