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国际平坦地球协会于1956年正式成立。
The International Flat Earth Society was formally founded in 1956.
youdao
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地震定位：在多大距离内地球可不再被视为平坦的？
LocatingEarthquakes: at What Distance Can the Earth No Longer Be Treated as Flat?
youdao
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地震定位：在多大距离内地球可不再被视为平坦的？
LocatingEarthquakes: at What Distance Can the Earth No Longer Be Treated as Flat?
youdao