NASA will trade the Artemis mission that was expected to land astronauts on the moon for a new plan intended to increase launch frequency of the agency's mega rocket.
帕特尔指出，“美国目前国内钪产量为零，也没有在中国以外已经投产运转的替代来源”，现有库存恐怕以“月”为单位计算，而非“年”。
。夫子对此有专业解读
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