Because you've got to include the man who grew the coffee, which was brewed for the man who was on the oil rig, who was drilling for oil, which was going to be made into the plastic, etc.
因为你得包括生产咖啡的人们， 他们给那些在石油钻台工作的人们提供咖啡， 石油钻台人们提取石油，使之生产出塑料等等。