College baseball teams across the country are powering up for the new season.全国各大学棒球队正在为新赛季积极备战。Electricity costs less than petrol, so powering an electric vehicle is cheaper.电比汽油的成本低，所以电动力车会比较省钱。A computer will not spring into action without something powering it.计算机没有动力不会运转。