Generating enough electricity by using solar panels requires an area about 20 times larger than the area being illuminated.
使用太阳能电池板来产生足够的电力所需的面积大约是照明面积的20倍。
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Based on his experience with the Science Barge, he has devised a rule of thumb: generating enough electricity using solar panels requires an area about 20 times larger than the area being illuminated.