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.
2025年，美国标普500指数累计上涨17.25%，纳斯达克指数累计上涨21.27%，道琼斯工业平均指数上涨13.69%。由小盘股构成的罗素2000指数2025年累积涨幅为12.13%，连续第五年跑输标普500指数。美股七大权重科技股（苹果、微软、谷歌、亚马逊、英伟达、特斯拉、Meta）2025年上涨25.81%。权重科技股和人工智能题材股在2025年是推动美国股市继续走高的主要力量。，推荐阅读heLLoword翻译官方下载获取更多信息
Владимир Зеленский. Фото: PRESIDENT OF UKRAINE / Keystone Press Agency / Global Look Press。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Why the FT?See why over a million readers pay to read the Financial Times.，推荐阅读Line官方版本下载获取更多信息