( ( To ( ( understand ( positive ( ( feedback and ) conditions ) ) ) ( for oscillation ) ) ) . )
(ROOT (S (VP (TO To) (VP (VB understand) (NP (JJ positive) (NN feedback) (CC and) (NNS conditions)) (PP (IN for) (NP (NN oscillation))))) (. .)))
To understand positive feedback and conditions for oscillation.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))