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现世界肉类生产结构是:猪肉9418.6万吨,占38.4％;牛肉5788.4万吨,占23.6％;羊肉1154.9万吨,占4.7％;禽肉7386.9万吨,占30.1％,可见,猪肉仍是世界最普及的肉食品,人类40％的肉食来自猪。养猪在不同国家地位不同,结构也不同。大约归纳以下5类:
The world meat production structure is: 94,186,000 tons of pork, accounting for 38.4%; beef 57,884,000 tons, accounting for 23.6%; lamb 11,549,000 tons, accounting for 4.7%; poultry 738,690,000 tons, accounting for 30.1%, shows that pork is still The world’s most popular meat food, 40% of human consumption of meat from pigs. Pigs have different status and structure in different countries. Summarize the following five categories: