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| 作者简介：Mary Pope Osborne and Natalie Pope Boyce are sisters who grew up on army posts all over the world. Mary is the author of over 50 acclaimed books for children. Natalie has worked as a children's librarian and as a teacher of English and E.S.L. This is their sixth book together. They live in New York and New England respectively |
| 1. Polar Bears and the Arctic 2. The Arctic 3. First People of the Arctic 4. Arctic Animals 5. Polar Bears 6. Polar Bear Life 7. The Arctic Is Melting! Doing More Research Index |
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