Two anthropologist-linguists, Franz Boas and Edward Sapir, were pioneers in describing many native languages of North and South America during the first half of the twentieth century.

• 简要分析：这里划线部分，最好译为“南北美洲诸多印第安语言”，而不要译为“南北美洲诸多本地语言（本族语言），或是南北美洲诸多地方语言”。原因应该是不言自明的。