( ( ( ( understand ( that ( ( ( long levers ) ( -LRB- ( ( as ( in ( hand-held implements ) ) ) -RRB- ) ) ) ( have ( ( the potential ) ( of ( ( producing ( great ( ( force or ) velocity ) ) ) ( than ( short levers ) ) ) ) ) ) ) ) ) and ) ( ( choose equipment ) ( appropriately ( to ( improve performance ) ) ) ) ) . )
(ROOT (S (VP (VP (VB understand) (SBAR (IN that) (S (NP (NP (JJ long) (NNS levers)) (PRN (-LRB- -LRB-) (PP (RB as) (IN in) (NP (JJ hand-held) (NNS implements))) (-RRB- -RRB-))) (VP (VBP have) (NP (NP (DT the) (NN potential)) (PP (IN of) (S (VP (VBG producing) (NP (JJ great) (NN force) (CC or) (NN velocity)) (PP (IN than) (NP (JJ short) (NNS levers))))))))))) (CC and) (VP (VB choose) (NP (NN equipment)) (ADVP (RB appropriately) (S (VP (TO to) (VP (VB improve) (NP (NN performance)))))))) (. .)))
understand that long levers (as in hand-held implements) have the potential of producing great force or velocity than short levers and choose equipment appropriately to improve performance.
(ROOT (S (NP (DT The) (JJ long) (NN bone)) (VP (VBP work) (PP (IN as) (NP (NN lever)))) (. .)))