( ( ( ( Heating ( and ( air ( conditioning systems ) ) ) ) , ) ( insulation ( , ( ( vents and ) ductwork ) ) ) ) ; )
(ROOT (NP (NP (NN Heating) (CC and) (NN air) (NN conditioning) (NNS systems)) (, ,) (NP (NN insulation) (, ,) (NN vents) (CC and) (NN ductwork)) (: ;)))
Heating and air conditioning systems, insulation, vents and ductwork;
(ROOT (S (NP (DT A) (JJ sealed) (, ,) (JJ vacuum-insulated) (NN reaction) (NN flask)) (VP (VBZ approximates) (NP (NP (DT the) (NN condition)) (PP (IN of) (NP (NP (DT a) (VBN isolated) (NN system)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CC neither) (NP (NN matter)) (CC nor) (NP (NN heat))) (VP (MD can) (VP (VB be) (VP (VBN exchanged) (PP (IN between) (NP (NN system) (CC and) (NNS surroundings)))))))))))) (. .)))
A sealed, vacuum-insulated reaction flask approximates the condition of a isolated system, in which neither matter nor heat can be exchanged between system and surroundings.