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Isaacman also said the agency would halt work to develop a more powerful version of the SLS rocket's upper stage, known as the Exploration Upper Stage, or EUS. Instead, NASA will go forward with a "standardized," less powerful stage but one that will minimize major changes between flights and utilize the same launch gantry.。safew官方版本下载是该领域的重要参考
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“Soon you will see numbers that few people would think were possible to achieve just a short time ago,” Trump said.
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