When oil prices peaked in early July with the national average reaching $4.11 a gallon, who could have guessed that only four months later, US gas prices would drop to $1.72 a gallon?
當油價在 7 月初達到頂峰,全國平均油價達到每加侖 4.11 美元時,誰能想到僅僅四個月後,美國油價就會降到每加侖 1.72 美元?