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The world’s largest dam – level 3
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The giant Baihetan hydropower plant in China opens for...How to mine Bitcoin – level 1
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Bitcoin is digital money. One person can send bitcoin...How to mine Bitcoin – level 2
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Bitcoin is a digital currency without a central bank....How to mine Bitcoin – level 3
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Bitcoin is a digital currency without a central bank...New sensors help women – level 1
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Scientists make three sensors. These sensors help during labor....Problems in car industry – level 3
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The global semiconductor chip shortage will cost automakers 110...