当然是部分处理过了， 而且FSDA规定使用前可以冷冻1到3个月

• Source of chicken: McNuggets are made from all-white meat chicken, including the tenderloin, breast, and rib meat.
• Grinding: The chicken meat is ground and mixed with seasonings, chicken skin, and a marinade to add flavor and moisture.
• Forming: The meat mixture is then pressed and molded into the four signature shapes: the bell, the boot, the ball, and the bow-tie.
• Battering and frying: The nuggets are coated in a tempura batter, par-fried to set the coating, and then flash-frozen.
• Final preparation: When they arrive at a McDonald's restaurant, they are fully fried before being served.