For more:
https://news.cgtn.com/news/2021-04-04/Ocean-mysteries-How-much-do-you-know--ZbKAkQl9w4/index.html
Mankind has never stopped exploring the ocean. Yet, for all of our reliance on the ocean, more than 80 percent of this vast, underwater realm remains unmapped, unobserved and unexplored. How much do ordinary people know about the ocean? CGTN takes to the streets to test their understanding of the ocean. #TidesofChina #ocean
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