遇见会说Hello和Bye Bye的鲸鱼

captivity - n. the state of being kept in a place (such as a prison or a cage) and not being able to leave or be free : the state or condition of being captive

prey - n. an animal that is hunted or killed by another animal for food

audience - n. a group of people who gather together to listen to something (such as a concert) or watch something (such as a movie or play)

mimic - v. to copy (someone or someone's behavior or speech)

dialect - n. a form of a language that is spoken in a particular area and that uses some of its own words, grammar, and pronunciations

morphology - n. the study and description of how words are formed in language