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出版CENGAGE Learning, 2013-04-24
ISBN11339450749781133945079
URLhttp://books.google.com.hk/books?id=t5CbAQAACAAJ&hl=&source=gbs_api
註釋Our World is a six-level primary series in American English that uses fun and fascinating National Geographic content, with stunning images and video, to give young learners the essential English language, skills, and knowledge they need to understand their world.