bite backvtrtransitive verb: Verb taking a direct object--for example, "Say something." "She found the cat."
figurative (suppress an emotional or verbal response) (比喻)
收回，忍住不说
He bit back a groan.
bite backvi phrasalphrasal verb, intransitive: Verb with adverb(s) or preposition(s), having special meaning and not taking direct object--for example, "make up" [=reconcile]: "After they fought, they made up."