( ( That is ) ( , ( ( they ( ( ( ( ( can not ) ( ( obtain energy ) ( through ( respiration ( with oxygen ) ) ) ) ) , ) but ) ( can ( grow ( in ( ( the presence ) ( of air ) ) ) ) ) ) ) . ) ) )
(ROOT (S (INTJ (DT That) (VBZ is)) (, ,) (S (NP (PRP they)) (VP (VP (MD can) (RB not) (VP (VB obtain) (NP (NN energy)) (PP (IN through) (NP (NP (NN respiration)) (PP (IN with) (NP (NN oxygen))))))) (, ,) (CC but) (VP (MD can) (VP (VB grow) (PP (IN in) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN air))))))))) (. .)))
That is, they cannot obtain energy through respiration with oxygen, but can grow in the presence of air.
(ROOT (S (NP (JJ Anaerobic) (NN respiration)) (VP (VBZ occurs) (SBAR (IN if) (S (NP (NN oxygen)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN obtained) (PP (IN at) (NP (DT a) (JJ sufficient) (NN rate))))))))) (. .)))