月核的本质是什么？
Uncovering details about the lunar core is critical for developing accurate models of the moon's formation.
了解月球核心的细节有助于规范月球演化模型的准确限制条件。
A so-called Earth Departure stage and Altair lunar lander would sit atop the core stage and be launched into orbit to meet Orion spacecraft carrying moon-bound astronauts.
所谓的地球分离级和牵牛星月球着陆器在核心级之上，被发射进入轨道后，与载有登月宇航员的猎户座太空船会合。
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