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来源:雅诚德英语网
He started keeping tracks of sunspots, mapping them, so he wouldn't confuse them with any potential new planet.
他开始追踪太阳黑子,标注它们的位置,这样就不会把它们和任何潜在的新行星混淆了。
He started keeping tracks of sunspots, mapping them, so he wouldn't confuse them with any potential new planet.
他开始追踪太阳黑子,标注它们的位置,这样就不会把它们和任何潜在的新行星混淆了。