( It ( ( decreases ( with ( increasing pressure ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ decreases) (PP (IN with) (NP (VBG increasing) (NN pressure)))) (. .)))
It decreases with increasing pressure.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN gas) (NNS particles)) (VP (VB heat) (PRT (RP up))))) (, ,) (NP (NN pressure)) (VP (VBP increase)) (. .)))