词汇	economical potential energy
释义	economical potential energy 机理
随便看	sterling silver candlestick sterling silver cocktail shaker sterling silver coffee and tea set sterling silver covered food bowl sterling silver covered vegetable dish sterling silver cruet sterling silver cutlery sterling silver desert stand sterling silver egg stand sterling silver fork sterling silver fruit dish Sterling silver jewelry sterling silver knife sterling silver napkin ring sterling silver pepper shaker sterling silvers sterling silver spoon sterling silver threebranch candelabrum sterling silver toast rack sterling silver waiter Sterling's reflex sterlington sterling tonnage sterling white sterling worth