( ( The distances ) ( ( ( are ( not ( ( ( ( in ( ( meters or ) kilometers ) ) , ) but ) ( in ( ( the ( universal unit ) ) ( of distance ) ) ) ) ) ) ( given ( by ( the ( hydrogen ( particle diagram ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS distances)) (VP (VBP are) (PP (RB not) (PP (IN in) (NP (NNS meters) (CC or) (NNS kilometers))) (, ,) (CC but) (PP (IN in) (NP (NP (DT the) (JJ universal) (NN unit)) (PP (IN of) (NP (NN distance)))))) (PP (VBN given) (PP (IN by) (NP (DT the) (NN hydrogen) (NN particle) (NN diagram))))) (. .)))
The distances are not in meters or kilometers, but in the universal unit of distance given by the hydrogen particle diagram.
(ROOT (S (NP (JJ Meter) (JJ much) (NN distance)) (VP (MD can) (VP (VB beta) (NP (JJ particles) (NN travel)) (PP (IN through) (NP (NN air))))) (. .)))