The 2-acre (0.8-hectare) mock moon surface, made of sand and crushed granite, allows engineers to test systems and concepts as they prepare for NASA's return to the moon.
这块用砂石和花岗岩碎块制作的0.8公顷模拟月球表面，让工程师们可以为了美国太空总署(NASA)重返月球的计划而对各种系统和概念进行测试。
The 2-acre (0.8-hectare) mock moon surface, made of sand and crushed granite, allows engineers to test systems and concepts as they prepare for NASA's return to the moon.
这块用砂石和花岗岩碎块制作的0.8公顷模拟月球表面，让工程师们可以为了美国太空总署(NASA)重返月球的计划而对各种系统和概念进行测试。
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