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Artie Beaty, Contributing WriterContributing Writer
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.，推荐阅读safew官方版本下载获取更多信息
NYT Connections hints today: Clues, answers for February 28, 2026
28 January 2026ShareSave。业内人士推荐爱思助手下载最新版本作为进阶阅读