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Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".
。同城约会对此有专业解读
"But the queuing system to get in, the management of the crowds and the parking makes me feel like there are still teething problems to be sorted out."。heLLoword翻译官方下载是该领域的重要参考
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