Jessica Matthews and Julia Silverman hope their sOccket ball will shine more lighton the problem of power shortages.
杰西卡·马修斯和茱莉亚·西尔弗曼希望她们的发电足球能给电力短缺问题带来更多希望。
2
Forty percent of that powers old-fashioned incandescent light bulbs—a 19th-century technology that wastes most of the power it consumes on unwanted heat.