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The winter solstice events at Maeshowe demonstrate 梅萧韦古墓葬的冬至事件 an intimate and precise knowledge of 展现了古人 the sun's movements through the sky. 对太阳运行轨迹的精确了解 It was the first step on ourjourney to
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AS IT IS 2016-08-04 Ugandan Company Demonstrates Solar-Powered Bus 乌干达演示太阳能汽车 A bus powered by the suns energy has made its public debut. Kiira Motors Corporation demonstrated the new electric bus recently at a sports center in th
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Robots as Fast as Cheetahs? 机器人像猎豹一样快吗? Scientists have been experimenting with four-legged robots for years. They want the ability to use robots like pack animals to carry heavy loads over difficult areas of land. But providing e
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Backup Motor May Save Pilots Lives 备用电机或可挽救飞行员的生命 In case of engine failure, multi-engine aircraft often have enough power to land safely, but single-engine planes have a very small chance of avoiding a fatal crash. Now, t
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thinking is necessary if you want to successd in life. people fear that thinking may upset their comfort and self-satifaction. thinking needs constant practice with enthusiasm, enthusiasm generates interest and susutains thinking. and concentration
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