└─ 美国国家地理分级读物《Ladders》系列 ->
  ├─ 09.高阶社会科学【33本】 ->
    ├─ Yosemite National Park-2.pdf - 47.2M
    ├─ Yosemite National Park-3.pdf - 47.3M
    ├─ Yosemite National Park-1.pdf - 50.7M
    ├─ Yellowstone National Park-2.pdf - 44.9M
    ├─ Yellowstone National Park-3.pdf - 44.5M
    ├─ Yellowstone National Park-1.pdf - 48.7M
    ├─ The Pueblo-3.pdf - 42M
    ├─ The Maya-1.pdf - 50.3M
    ├─ The Pueblo-2.pdf - 41.5M
    ├─ The Pueblo-1.pdf - 45.1M
    ├─ The Maya-2.pdf - 46.3M
    ├─ The Maya-3.pdf - 46.6M
    ├─ The Inca-3.pdf - 46.4M
    ├─ The Inca-1.pdf - 51M
    ├─ The Inca-2.pdf - 47.2M
    ├─ The Declaration of Independence-3.pdf - 38.4M
    ├─ The Declaration of Independence-2.pdf - 37.6M
    ├─ The Declaration of Independence-1.pdf - 40.7M
    ├─ The Azte-3.pdf - 49.5M
    ├─ The Azte-2.pdf - 50.4M
    ├─ The Azte-1.pdf - 55M
    ├─ Great Smoky Mountains National Park-3.pdf - 46.1M
    ├─ Great Smoky Mountains National Park-2.pdf - 46M
    ├─ Great Smoky Mountains National Park-1.pdf - 48.4M
    ├─ Everglades National Park-1.pdf - 52.4M
    ├─ Grand Canyon National Park-3.pdf - 45.9M
    ├─ Grand Canyon National Park-2.pdf - 44.1M
    ├─ Grand Canyon National Park-1.pdf - 46.4M
    ├─ Everglades National Park-3.pdf - 48.8M
    ├─ Everglades National Park-2.pdf - 48.7M
    ├─ Big Bend National Park-3.pdf - 39.4M
    ├─ Big Bend National Park-1.pdf - 45.1M
    └─ Big Bend National Park-2.pdf - 38.8M
  ├─ 08.高阶自然科学【30本】 ->
    ├─ The World's Ocean-3.pdf - 40.7M
    ├─ The World's Ocean-2.pdf - 40.2M
    ├─ The World's Ocean-1.pdf - 43.3M
    ├─ The Sinking of the Titanic-3.pdf - 41.2M
    ├─ The Sinking of the Titanic-2.pdf - 41.8M
    ├─ The Sinking of the Titanic-1.pdf - 45.2M
    ├─ The Galdpagos Ilslands-3.pdf - 34.9M
    ├─ The Disappearing Badlands-3.pdf - 45M
    ├─ The Galdpagos Ilslands-2.pdf - 36.2M
    ├─ The Galdpagos Ilslands-1.pdf - 37.5M
    ├─ The Disappearing Badlands-1.pdf - 48.4M
    ├─ The Disappearing Badlands-2.pdf - 43.1M
    ├─ Power Up-3.pdf - 41.3M
    ├─ Power Up-2.pdf - 43.5M
    ├─ Power Up-1.pdf - 45.4M
    ├─ Nature Has the Answers-3.pdf - 36.8M
    ├─ Nature Has the Answers-2.pdf - 36.5M
    ├─ Nature Has the Answers-1.pdf - 40.5M
    ├─ Going Green-2.pdf - 46.3M
    ├─ Going Green-3.pdf - 47M
    ├─ Going Green-1.pdf - 51.1M
    ├─ Exploring Above and Beyond-3.pdf - 42.7M
    ├─ Exploring Above and Beyond-2.pdf - 44.2M
    ├─ Exploring Above and Beyond-1.pdf - 46.6M
    ├─ Earth's Crazy Climate-3.pdf - 39.3M
    ├─ Earth's Crazy Climate-2.pdf - 41.1M
    ├─ Earth's Crazy Climate-1.pdf - 41.6M
    ├─ African Savanna-3.pdf - 43.1M
    ├─ African Savanna-2.pdf - 43M
    └─ African Savanna-1.pdf - 46.1M
  ├─ 07.高阶核心阅读【24本】 ->
    ├─ Watery World-980L.pdf - 45.9M
    ├─ Watery World-900L.pdf - 45.4M
    ├─ Watery World-800L.pdf - 45.7M
    ├─ Watery World-730L.pdf - 48.4M
    ├─ Transformers-990L.pdf - 28.5M
    ├─ Transformers-890L.pdf - 28M
    ├─ Transformers-790L.pdf - 27.2M
    ├─ The Old West-890L.pdf - 31.2M
    ├─ The Old West-980L.pdf - 30.1M
    ├─ Transformers-700L.pdf - 31M
    ├─ The Old West-780L.pdf - 30.4M
    ├─ Moving Into the Future-920L.pdf - 36.1M
    ├─ The Old West-630L.pdf - 32.9M
    ├─ Moving Into the Future-780L.pdf - 38.9M
    ├─ Moving Into the Future-830L.pdf - 34.9M
    ├─ Moving Into the Future-1000L.pdf - 35.8M
    ├─ Connections to Nature-860L.pdf - 42M
    ├─ Connections to Nature-940L.pdf - 41.7M
    ├─ Connections to Nature-750L.pdf - 45.2M
    ├─ Connections to Nature-1010L.pdf - 41M
    ├─ Catch the Light-990L.pdf - 37M
    ├─ Catch the Light-920L.pdf - 37.5M
    ├─ Catch the Light-790L.pdf - 35.8M
    └─ Catch the Light-670L.pdf - 39.3M
  ├─ 06.中级社会科学【39本】 ->
    ├─ Pacific Coast-3.pdf - 45.6M
    ├─ Pacific Coast-2.pdf - 45.5M
    ├─ Pacific Coast-1.pdf - 49.6M
    ├─ North Atlantic Coast-2.pdf - 50.1M
    ├─ North Atlantic Coast-3.pdf - 49.5M
    ├─ North Atlantic Coast-1.pdf - 54.1M
    ├─ Niagara Fals-2.pdf - 48.6M
    ├─ Niagara Fals-3.pdf - 48.8M
    ├─ Niagara Fals-1.pdf - 52.6M
    ├─ Native Americans of the Southwest-2.pdf - 48.4M
    ├─ Native Americans of the Southwest-3.pdf - 52.9M
    ├─ Native Americans of the Southwest-1.pdf - 53.9M
    ├─ Native Americans of the Southeast-3.pdf - 46.1M
    ├─ Native Americans of the Southeast-2.pdf - 46.1M
    ├─ Native Americans of the Southeast-1.pdf - 50.4M
    ├─ Native Americans of the Pacific Northwest-1.pdf - 48.1M
    ├─ Native Americans of the Pacific Northwest-3.pdf - 45.1M
    ├─ Native Americans of the Pacific Northwest-2.pdf - 44.8M
    ├─ Native Americans of the Great Plains-2.pdf - 44.5M
    ├─ Native Americans of the Great Plains-3.pdf - 45.4M
    ├─ Native Americans of the Great Plains-1.pdf - 49M
    ├─ Mount Rushmore-3.pdf - 47.2M
    ├─ Mount Rushmore-1.pdf - 51.7M
    ├─ Mount Rushmore-2.pdf - 47.2M
    ├─ Gulf Coast-1.pdf - 50.5M
    ├─ Gulf Coast-3.pdf - 47.1M
    ├─ Great Plains-3.pdf - 45.2M
    ├─ Gulf Coast-2.pdf - 46.6M
    ├─ Great Plains-2.pdf - 44.7M
    ├─ Great Plains-1.pdf - 48.9M
    ├─ Great Lakes-3.pdf - 46.8M
    ├─ Great Lakes-2.pdf - 46.9M
    ├─ Great Lakes-1.pdf - 50.9M
    ├─ Golden Gate Bridge-3.pdf - 42.8M
    ├─ Golden Gate Bridge-2.pdf - 43.2M
    ├─ Golden Gate Bridge-1.pdf - 47.5M
    ├─ Empire State Building-3.pdf - 48.7M
    ├─ Empire State Building-2.pdf - 46M
    └─ Empire State Building-1.pdf - 49M
  ├─ 05.中级自然科学【30本】 ->
    ├─ 30.pdf - 38.1M
    ├─ 29.pdf - 38.4M
    ├─ 28 Smart Animals!.pdf - 41.2M
    ├─ 27.pdf - 46M
    ├─ 26.pdf - 47.9M
    ├─ 25 At the Movies!.pdf - 48.9M
    ├─ 24.pdf - 41.8M
    ├─ 23.pdf - 45.7M
    ├─ 22 Exploring Coral Reefs!.pdf - 47.8M
    ├─ 21.pdf - 40.7M
    ├─ 20.pdf - 40.7M
    ├─ 19 Tim Samaras.pdf - 44.7M
    ├─ 18.pdf - 46M
    ├─ 17.pdf - 46.1M
    ├─ 16 Super Structures!.pdf - 49.8M
    ├─ 14.pdf - 41.4M
    ├─ 15.pdf - 40.9M
    ├─ 13 Let's Keep Moving!.pdf - 46.3M
    ├─ 12.pdf - 40.9M
    ├─ 11.pdf - 44.2M
    ├─ 10 Weird but True!.pdf - 44.8M
    ├─ 09.pdf - 45.5M
    ├─ 08.pdf - 45.8M
    ├─ 07 Pattems!.pdf - 48.7M
    ├─ 03.pdf - 42.6M
    ├─ 06.pdf - 36.2M
    ├─ 05.pdf - 36M
    ├─ 02.pdf - 45.5M
    ├─ 04 Let's Cook!.pdf - 39.1M
    └─ 01 The Chesapeake Bay!.pdf - 50.3M
  ├─ 04.中级核心阅读【20本】 ->
    ├─ 20.pdf - 42.4M
    ├─ 18.pdf - 41.6M
    ├─ 19.pdf - 41.9M
    ├─ 17 Worth Saving!.pdf - 44.6M
    ├─ 15.pdf - 33.8M
    ├─ 16.pdf - 34.6M
    ├─ 14.pdf - 33.8M
    ├─ 13 Nature's Genius!.pdf - 37.9M
    ├─ 12.pdf - 30M
    ├─ 11.pdf - 29.5M
    ├─ 10.pdf - 29.3M
    ├─ 08.pdf - 35.3M
    ├─ 09 Lend Me a Paw!.pdf - 33.3M
    ├─ 07.pdf - 37.1M
    ├─ 05 Moon Mysteries!.pdf - 40.3M
    ├─ 06.pdf - 36.2M
    ├─ 04.pdf - 45.7M
    ├─ 03.pdf - 45M
    ├─ 02.pdf - 45.6M
    └─ 01 The Quest!.pdf - 48.6M
  ├─ 02.初级自然科学【30本】 ->
    ├─ Tropical Rain Forest Adventure-810L.pdf - 34.3M
    ├─ Tropical Rain Forest Adventure-720L.pdf - 33.1M
    ├─ Tropical Rain Forest Adventure-620L.pdf - 37.5M
    ├─ Tricks,Traps,and Tools-810L.pdf - 27.3M
    ├─ Tricks,Traps,and Tools-680L.pdf - 27.6M
    ├─ Tricks,Traps,and Tools-550L.pdf - 31.9M
    ├─ On Assignment with Joel Sartore-820L.pdf - 33.7M
    ├─ On Assignment with Joel Sartore-710L.pdf - 35M
    ├─ On Assignment with Joel Sartore-600L.pdf - 39.1M
    ├─ Ladders-Earth Science-Roller Coasters-860L.pdf - 32M
    ├─ Ladders-Earth Science-Roller Coasters-710L.pdf - 32.7M
    ├─ Ladders-Earth Science-Roller Coasters-570L.pdf - 35.5M
    ├─ Ladders-Earth Science-Eruption-810L.pdf - 36.5M
    ├─ Ladders-Earth Science-Eruption-700L.pdf - 35.3M
    ├─ Ladders-Earth Science-Eruption-590L.pdf - 39.9M
    ├─ Ladders-Earth Science-Destination Space-860L.pdf - 31.1M
    ├─ Ladders-Earth Science-Destination Space-710L.pdf - 30.8M
    ├─ Ladders-Earth Science-Destination Space-610L.pdf - 34.6M
    ├─ Ladders-Earth Science-Cool Caves-740L.pdf - 33.5M
    ├─ Ladders-Earth Science-Cool Caves-840L.pdf - 33.9M
    ├─ Ladders-Earth Science-Cool Caves-590L.pdf - 37.1M
    ├─ Ladders-Earth Science-Big Storm-720L.pdf - 34.4M
    ├─ Ladders-Earth Science-Big Storm-810L.pdf - 32.6M
    ├─ Ladders-Earth Science-Big Storm-580L.pdf - 38.4M
    ├─ Keep Outl Keep Away-580L.pdf - 33.8M
    ├─ Keep Outl Keep Away-780L.pdf - 31M
    ├─ Keep Outl Keep Away-690L.pdf - 29.4M
    ├─ Hidden Discoveries-790L.pdf - 31.4M
    ├─ Hidden Discoveries-650L.pdf - 32.6M
    └─ Hidden Discoveries-530L.pdf - 35.6M
  └─ 01.初级核心阅读【32本】 ->
    ├─ Onward-820L.pdf - 32.7M
    ├─ Onward-670L.pdf - 32.4M
    ├─ Onward-490L.pdf - 30.7M
    ├─ Onward-400L.pdf - 34.9M
    ├─ Mixed-Up Matter-640L.pdf - 26.6M
    ├─ Mixed-Up Matter-800L.pdf - 26.8M
    ├─ Mixed-Up Matter-490L.pdf - 25.9M
    ├─ Mixed-Up Matter-380L.pdf - 29.9M
    ├─ Make a Difference-840L.pdf - 31.3M
    ├─ Make a Difference-690L.pdf - 30.9M
    ├─ Make a Difference-430L.pdf - 34M
    ├─ Forces of Nature-810L.pdf - 40.6M
    ├─ Make a Difference-550L.pdf - 30.9M
    ├─ Forces of Nature-720L.pdf - 39.3M
    ├─ Forces of Nature-580L.pdf - 37.1M
    ├─ Forces of Nature-450L.pdf - 40.3M
    ├─ All Together Now-420L.pdf - 30.3M
    ├─ Dinosaurs-680L.pdf - 41.3M
    ├─ Dinosaurs-840L.pdf - 40.1M
    ├─ Dinosaurs-530L.pdf - 39.1M
    ├─ Dinosaurs-410L.pdf - 43.1M
    ├─ Birthday Celebrations-840L.pdf - 30.5M
    ├─ Birthday Celebrations-720L.pdf - 30.8M
    ├─ Birthday Celebrations-570L.pdf - 29.8M
    ├─ Amazing Plants-820L.pdf - 45.3M
    ├─ Birthday Celebrations-450L.pdf - 34.9M
    ├─ Amazing Plants-450L.pdf - 48.7M
    ├─ Amazing Plants-710L.pdf - 45.7M
    ├─ Amazing Plants-570L.pdf - 44.3M
    ├─ All Together Now-710L.pdf - 26.5M
    ├─ All Together Now-540L.pdf - 25.2M
    └─ All Together Now-840L.pdf - 26.4M

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