LONGMAN 解释: cost 1 [countable] the amount of money that you have to pay in order to buy, do, or produce somethingCOLLOCATIONS COLLOCATIONS
pay the cost of something meet bear the cost (of something) (=pay for something) cover the cost (of something) (=pay for all of something) the cost of doing something at a cost of $10/$100 etc high/low cost full/total cost extra/additional cost rising/escalating cost at no extra cost (to somebody) labour/transport/legal etc costs running/operating costs (=what it costs to organize an event or run a business)
OG解释: 1)The wording of D implies that cost… is estimated in order to meet environmental regulations. 2)E alone makes a logical statement and varies verb tense to indicate that the issue is present estimates of future costs.
结合OG解释,我分析 D To meet environmental regulations, the cost to the United States petroleum industry .....改变了原句的意思。原句是对将来某一时点做出美国石油产业在环保方面的成本预测,并非是特意为了符合环保政策,成本如何。