( ( A ( characteristic ( strong ( musky odor ) ) ) ) ( generally ( ( permeates ( their retreats ) ) . ) ) )
(ROOT (S (NP (DT A) (JJ characteristic) (JJ strong) (NN musky) (NN odor)) (ADVP (RB generally)) (VP (VBZ permeates) (NP (PRP$ their) (NNS retreats))) (. .)))
A characteristic strong musky odor generally permeates their retreats.
(ROOT (S (NP (JJ Strong) (NN odor)) (VP (VBZ helps) (S (NP (DT some) (NNS animals)) (VP (VB defend) (NP (PRP themselves)) (PP (IN against) (NP (NNS predators)))))) (. .)))
Strong odor helps some animals defend themselves against predators.