This has been a disastrously expensive strategy over the past four years, during which tight supplies have seen spot prices exceed rising contract prices.
This has been a disastrously expensive strategy over the past four years, during which tight supplies have seen spot prices exceed rising contract prices.
在过去4年中，这种战略的代价极为昂贵，在此期间，供应紧张使现货价格超出了日益上涨的合同价格。