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Continue to ChatNASA X-57 Maxwell 全電動飛機首次亮相,預計 2020 年底試飛! https://3c.yipee.cc/154820/nasa-x-57-maxwell-%e5%85%a8%e9%9b%bb%e5%8b%95%e9%a3%9b%e6%a9%9f%e9%a6%96%e6%ac%a1%e4%ba%ae%e7%9b%b8%ef%bc%8c%e9%a0%90%e8%a8%88-2020-%e5%b9%b4%e5%ba%95%e8%a9%a6%e9%a3%9b%ef%bc%81/