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Isaacman pointed to hydrogen leaks on Artemis I and helium flow problems on Artemis II as signs that a three‑year gap between launches is not sustainable. When teams only fly every few years, he said, they lose "muscle memory" — the routine, hands-on experience required to handle a complex rocket safely and efficiently.
2026-02-28 00:00:00:03014271610http://paper.people.com.cn/rmrb/pc/content/202602/28/content_30142716.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/28/content_30142716.html11921 彭清华会见老挝和平与团结委员会考察团