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 UID77283 帖子388 积分444 学分1726 个 金币0 个 在线时间55 小时 
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                 (1)That which people can see, with the aid of various sorts of telescope, accounts for just 4% of the total mass. (2)What exactly constitutes this dark matter and dark energy remains mysterious, but physicists have recently uncovered some more clues, about the former, at least.
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