Mary: Well there was Robert Taylor, Frank Sinatra, Walter Pidgeon and Gregory Peck.
玛丽:哦,有罗伯特·泰勒、弗兰克·西纳特拉、沃尔特•皮约翰和格利·高里·派克。
Various industrial methods are used to extract magnesium, ranging from an electrolytic process to a high temperature method called the Pidgeon process, but the energy cost is high.