在表演以后, 与卡瑟琳·弗里曼一起加入我们的实时聊天!After the show, join our live chat with Catherine Freeman!购买力平价是由瑞典经济学家卡尔.卡瑟尔所研究提出.Purchasing power parity was developed by Swedish economist Karl Cassel....

“卡瑟”的英语可以翻译为：[人名]Cathe...