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.
Фото: Victor VIRGILE / Gamma-Rapho via Getty Images
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Что думаешь? Оцени!，这一点在夫子中也有详细论述
Paramount Skydance and Warner Bros. Discovery are officially merging. The studio paid Netflix the $2.8 billion termination fee it was owed for breaking its original deal to buy Warner Bros. earlier today, and the historic film studio has now formally accepted Paramount’s offer.，推荐阅读同城约会获取更多信息