COMAC's CE-25A Electric Commercial Aircraft Completes Its First Crewed Flight
COMAC's 19-seat CE-25A electric aircraft flew with two pilots and a flight test engineer aboard for the first time, covering 60.4 km in 16 minutes 38 seconds.
一张新的藏宝图揭示了地球上失落的史前生物可能隐藏在哪里A new treasure map reveals where Earth's lost prehistoric life may be hiding
对5.4亿年海洋化石的全面分析揭示了我们在对地球古代生命的认识上存在令人惊讶的空白。科学家们发现，在寻找此前未知的物种方面，一些最大的机会在于……A sweeping analysis of 540 million years of marine fossils has revealed surprising gaps in our understanding of Earth's ancient life. Scientists discovered that some of the greatest opportunities for finding previously u
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