"When you regain these core competencies and you start exercising your muscles, your skills do not atrophy," he said. "It's safer. And yes, you are buying down risk, because you're able to test things in low Earth orbit before you need to get to the moon, which is exactly what we did during the Apollo era."
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双方还讨论了乌克兰问题,支持在联合国宪章和原则基础上停火止战、实现持久和平的努力。,详情可参考一键获取谷歌浏览器下载
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