The daily variation in properties of the Earth, such as the temperature or the local geomagnetic field, or the daily change in sunlight.
地球各种特征每天的变化，如温度、局部地磁场每天的变化、以及阳光每天的变化。
The daily variation in properties of the Earth, such as the temperature or the local geomagnetic field, or the daily change in sunlight.
地球各种特征每天的变化，如温度、局部地磁场每天的变化、以及阳光每天的变化。
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