( ( ( Apart ( from ( these ( material ( properties phase ) ) ) ) ) ( change materials ) ) ( ( offer ( ( the capability ) ( to ( ( accumulate heat ) ( at ( a ( constant temperature ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (ADJP (JJ Apart) (PP (IN from) (NP (DT these) (NN material) (NNS properties) (NN phase)))) (NN change) (NNS materials)) (VP (VBP offer) (S (NP (DT the) (NN capability)) (VP (TO to) (VP (VB accumulate) (NP (NN heat)) (PP (IN at) (NP (DT a) (JJ constant) (NN temperature))))))) (. .)))
Apart from these material properties phase change materials offer the capability to accumulate heat at a constant temperature.
(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))) (. .)))