Poultry products are important sources of protein throughout the world.
在世界各地，禽类产品是蛋白质的重要来源。
In all countries of the world, people have direct or indirect contact with poultry.
在所有国家，人们都直接或间接地接触到家禽。
In all countries of the world, people have direct or indirect contact with poultry.
在所有国家，人们都直接或间接地接触到家禽。
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