The price of any commodity is affected by the supply-demand relationship.
任何商品的价格，都会受到供需关系的影响。
2
We have not seen improving trends in U.S. petroleum supply-demand picture of late, particularly for transportation fuels.
最近，美国石油供大于求的情况并未出现任何改善的趋势，交通燃油更是如此。
3
Meanwhile, the wages of labors will rise and the prices of energy and resources will further reflect the supply-demand relation of market and the environmental cost.