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A coin becomes a wheel

Viewed 972 times 2019-1-28 21:14 |Personal category:education|System category:Economy

My major was physics in the college. Once our headteacher led us to visit the Shandong University where  I saw such a scene in a lab: That master-professor put a coin-like metal into a glass half full of liquid nitrogen with steam rising up! Then he explained: The metal will become superconductor in such a low temperature. In future the technology will widely be used in every field for practice! 

Now for your laughing please let me say:
It takes us three decades to grow the coin into a train-wheel!:time::victory::lol 

(Opinions of the writer in this blog don't represent those of China Daily.)


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