说到底，钢铁公司天生需要对冲铁矿石价格的波动，而航空公司和公用事业公司天生需要对冲石油价格的波动。
After all, steel companies have an inherent need to hedge against fluctuations in the price of iron ore, just as airlines and utilities have an inherent need to hedge against fluctuations in the price of oil.