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US fast-food giant McDonald's is making a massive change to its burgers. It would begin making its Quarter Pounder burgers with fresh - not frozen - beef across the US by early May. 美国快餐巨头麦当劳在其汉堡制作上作出重大改变，将于5月初开始在美国使用非冷冻的新鲜牛肉制作“四盎司牛肉堡”。 The beef will be cooked fresh when a customer orders, which is a new process for the burger chain. 当顾客点餐时，牛肉将被新鲜烹饪，这是汉堡供应链的一道新工艺。 The chain's "Signature Crafted" burgers also will use fresh beef, though Big Macs and other burgers will continue to use frozen patties. 连锁店的“签名系列”汉堡也将使用新鲜牛肉，不过“巨无霸”和其他汉堡将继续使用冷冻肉饼。 | 
