( ( ( The ( resulting area ) ) ( of ( the ( basic shape ) ) ) ) ( ( should ( decrease ( ( as ( ( the altitude ) ( is increased ) ) ) ( , ( i.e. ( , ( ( the pressure ) ( decreases ( as ( ( the altitude ) increases ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (VBG resulting) (NN area)) (PP (IN of) (NP (DT the) (JJ basic) (NN shape)))) (VP (MD should) (VP (VB decrease) (S (SBAR (IN as) (S (NP (DT the) (NN altitude)) (VP (VBZ is) (VP (VBN increased))))) (, ,) (INTJ (UH i.e.)) (, ,) (NP (DT the) (NN pressure)) (VP (VBZ decreases) (SBAR (IN as) (S (NP (DT the) (NN altitude)) (VP (VBZ increases)))))))) (. .)))
The resulting area of the basic shape should decrease as the altitude is increased, i.e., the pressure decreases as the altitude increases.
(ROOT (S (NP (NNP Air)) (VP (VBP pressure) (SBAR (S (NP (PRP it)) (VP (VBZ decreases) (PP (IN as) (NP (NN altitude) (NNS increases))))))) (. .)))