来源:新浪2018-02-02
wheretheycouldrapidlymeltawaysnowafterwinterstormswithoutanyelectricity.bmwhasbeenexploringthatlastideawithgrossmansteam.onceheat-storagetechbecomespracticalperhapsinaslittleasadecadegrossmanexpectsmanyothernewusestoopenup.thermalbatteriestodayarewhereelectricalbatterieswereacenturyago