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美国空间科学现在正处在十字路口。本文讨论了要使美国空间研究摆脱当前困难时期并恢复其活力的任何计划都应该考虑的四个方面。
U.S. space science is now at a crossroads. This article discusses the four aspects that any program that wants to free US space research from the current difficult times and restore its vitality should consider four aspects.