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Terms for subject Earth sciences containing 宁静 | all forms | in specified order only
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为国际太阳宁静年探索Probe for the International Quiet Solar Year
国际宁静太阳年International Years of the Quiet Sun
国际宁静太阳年专门委员会Special Committee for the International Years of the Quiet Sun
国际太阳宁静International Years of the Quiet Sun
宁静太阳年quiet sun year
宁静电离层quiet ionosphere