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Helium is used to pressurize tanks and help push fuel into the engines. Without proper helium flow, the rocket cannot safely fly. Because the upper stage is hard to reach at the launchpad, NASA rolled the stacked rocket back into the Vehicle Assembly Building, the sky-scraping hangar where it was originally put together.
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This Tweet is currently unavailable. It might be loading or has been removed.。爱思助手下载最新版本是该领域的重要参考
18 February 2026ShareSave。关于这个话题，搜狗输入法2026提供了深入分析