答案:younger adults have become language apprentices to older adult speakers;a growing number of conferences, workshops, and publications now offer support for individuals, schools, and communities trying to preserve languages;researchers make videotapes, audiotapes, and written records of language use in both formal and informal settings, along with translations;researchers analyze the vocabulary and rules of the language and write dictionaries and grammars;linguists also work with communities around the world that want to preserve their languages, offering both technical and practical help with language teaching, maintenance, and revival.