D-Day is approaching. They don’t kn...
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After everything that the citizens ...
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In this instant New York Times best...
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A Southern charmer for fans of Newb...
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An urgent, essential collection of ...
【TED-Ed】How turtle shells evolved | 龟壳是如何进化的
现代龟壳几乎和龟本身一样品类繁多。海龟的壳更平坦、更轻一些，便于它们在...
【TED-Ed】宇宙尘埃 | The dust bunnies that built our planet
考虑你现在所坐的位置。时光倒流，它可能被淹没在浅海底部，埋在数英里深的...
【TED-Ed】什么会导致经济衰退 | What causes an economic recession
千百年来，英国人民一直使用青铜来制造工具和珠宝，并作为贸易的货币。但大...
