( ( In ( this system ) ) ( ( ( the ( adaptive ( mirror 's ) ) ) focus ) ( ( is ( adjusted ( by ( regulating ( ( the pressure ) ( of ( ( mirror 's ) ( cooling water ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN system))) (NP (NP (DT the) (NN adaptive) (NN mirror) (POS 's)) (NN focus)) (VP (VBZ is) (ADJP (VBN adjusted) (PP (IN by) (S (VP (VBG regulating) (NP (NP (DT the) (NN pressure)) (PP (IN of) (NP (NP (NN mirror) (POS 's)) (VBG cooling) (NN water))))))))) (. .)))
In this system the adaptive mirror's focus is adjusted by regulating the pressure of mirror's cooling water.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN water)) (VP (VBP vapor) (PP (IN from) (NP (DT a) (JJ hot) (NN shower) (NNS contacts))) (NP (NP (DT the) (JJR cooler) (NN surface)) (PP (IN of) (NP (DT a) (NN mirror))))))) (, ,) (NP (DT the) (NN result)) (VP (VBZ is) (SBAR (IN that) (S (NP (NNP foggy)) (VP (VBP mirror))))) (. .)))