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宁静
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Chinese
English
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
年
International Years of the Quiet Sun
宁静
太阳年
quiet sun year
宁静
电离层
quiet ionosphere
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