( We ( ( ( ( ( ( defined pressure ) ( as ( ( a force ) ( per ( unit area ) ) ) ) ) , ) and ) ( described ( how ( it ( may ( be ( defined ( at ( ( any point ) ( within ( an ( ideal gas ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VP (VBD defined) (NP (NN pressure)) (PP (IN as) (NP (NP (DT a) (NN force)) (PP (IN per) (NP (NN unit) (NN area)))))) (, ,) (CC and) (VP (VBD described) (SBAR (WHADVP (WRB how)) (S (NP (PRP it)) (VP (MD may) (VP (VB be) (VP (VBN defined) (PP (IN at) (NP (NP (DT any) (NN point)) (PP (IN within) (NP (DT an) (JJ ideal) (NN gas)))))))))))) (. .)))
We defined pressure as a force per unit area, and described how it may be defined at any point within an ideal gas.
(ROOT (S (NP (NN Pressure)) (VP (VBZ is) (VP (VBN defined) (PP (IN in) (NP (NN physics))) (PP (IN as) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN force)) (VP (VBG pushing) (PP (IN against) (NP (DT a) (VBN given) (NN area)))))))))) (. .)))