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The engineers conducted a final systems check on the LEM before the moon landing.
See correct answer
The engineers conducted a final systems check on the LEM before the moon landing.
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Related words
LEM
Noun
US
Japanese Meaning
月着陸船（アメリカ宇宙科学において、Lunar Excursion ModuleまたはLunar Moduleを指す） / 排中律（論理学において、任意の命題が真または偽のいずれかであるとする法則、Law of Excluded Middle）
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