The number of associations for the popularization of science in people's communes or towns has increased from 15,000 to 28,000 in the past year, with a total membership of 2 million.The grass-roots...
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The number of associations for the popularization of science in people's communes or towns has increased from 15,000 to 28,000 in the past year, with a total membership of 2 million.The grass-roots...