pioneer/ˌpaɪə'nɪər $ -'nɪr/

n. a person who is the first to do sth that other people then develop

n. [C] 先锋，开拓者：a pioneer in the field of photography 摄影领域的先驱

◇[pioneer of sth] the pioneers of space travel 太空旅行的开拓者

音组-eer/-'ɪər $ -'ɪr/

beer; cheer; deer; engineer; pioneer; volunteer