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• 1.英语听力：自然百科 探索世界奥秘之Life Story(生命物语) Unit4
• 探索世界奥秘之Life Story(生命物语) Unit4 Everything that's alive and quite a few things that aren't, gives off heat. That's what you are looking at no...
• 2.英语听力：自然百科 探索世界奥秘之Life Story(生命物语) Unit3
• 探索世界奥秘之Life Story(生命物语) Unit3 It's an amazing list. In fact, no life is an ordinary story. We'll each in our time do an incredible amount. ...
• 3.英语听力：自然百科 探索世界奥秘之Life Story(生命物语) Unit2
• 探索世界奥秘之Life Story(生命物语) Unit2 She'll crawl 150 kilometers before she's two. From then on, she'll learn a new word every two hours for the n...
• 4.英语听力：自然百科 探索世界奥秘之Life Story(生命物语) Unit1
• 探索世界奥秘之Life Story(生命物语) Unit1 There is one thing that everyone on earth has in common. We all live, eat and breathe within the human body. ...
• 5.英语听力：自然百科 探索世界奥秘之万里长城 Unit15
• 探索世界奥秘之万里长城 Unit15 When the British arrived at the emperor's summer residence, they were lavishly entertained and spent days touring its be...
• 6.英语听力：自然百科 探索世界奥秘之万里长城 Unit14
• 探索世界奥秘之万里长城 Unit14 The new Manchu dynasty tried something different with their neighbors, diplomacy. Here in their lovely Summer Palace, th...
• 7.英语听力：自然百科 探索世界奥秘之万里长城 Unit13
• 探索世界奥秘之万里长城 Unit13 The tombs all followed the same basic design, a temple in front and a walled enclosure with the underground tomb behind....
• 8.英语听力：自然百科 探索世界奥秘之万里长城 Unit12
• 探索世界奥秘之万里长城 Unit12 Here on a steep slope, defensive walls rise in steps up to the watchtower. So if the enemy did make it to the top of the...
• 9.英语听力：自然百科 探索世界奥秘之万里长城 Unit11
• 探索世界奥秘之万里长城 Unit11 With the Mongols expelled, the new rulers, the Ming emperors, were determined that an invasion would never happen again....
• 10.英语听力：自然百科 探索世界奥秘之万里长城 Unit10
• 探索世界奥秘之万里长城 Unit10 In summer, dried-up river valleys offered easy invasion routes for horsemen bent on sacking the rich Chinese towns of th...