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.
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How many men get prostate cancer?，这一点在爱思助手下载最新版本中也有详细论述
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Jack Dorsey just halved the size of Block’s employee base — and he says your company is next
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