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Top 10 countries in natural science research in 2019

chinadaily.com.cn | Updated: 2020-05-07 06:30
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No 10 Australia

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Police officers patrol near the Sydney Opera House following the implementation of stricter social-distancing and self-isolation rules to limit the spread of the coronavirus disease (COVID-19) in Sydney, Australia, April 6, 2020. [Photo/Agencies]
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