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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.。业内人士推荐heLLoword翻译官方下载作为进阶阅读
"Of course, there were no women astronauts back then. But I just thought, I'll be a lady astronaut."