( Earth ( ( is ( covered ( by ( ( ( one hydrosphere ) or ) ( ( one layer ) ( of ( connecting water ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Earth)) (VP (VBZ is) (VP (VBN covered) (PP (IN by) (NP (NP (CD one) (NN hydrosphere)) (CC or) (NP (NP (CD one) (NN layer)) (PP (IN of) (S (VP (VBG connecting) (NP (NN water)))))))))) (. .)))
Earth is covered by one hydrosphere or one layer of connecting water.
(ROOT (S (NP (NP (DT The) (NN surface)) (PP (IN of) (NP (NN earth)))) (VP (VBZ is) (VP (VBN covered) (PP (IN by) (NP (NP (DT a) (ADJP (RB relatively) (JJ thin)) (NN layer)) (PP (IN of) (NP (NP (NN water)) (VP (VBN called) (NP (DT the) (NN hydrosphere))))))))) (. .)))