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想象一下驾驶一辆载有100公斤食物的卡车前往一个遭遇饥荒的地区。如果将食物递送给那里的每个人所花的时间会造成20公斤食物的损坏,
Imagine driving a truck carrying 100 kilograms of food for a region that has suffered a famine. If the time it takes to deliver food to everyone there will cause damage to 20 kilos of food,