the price of source的用法和樣例：
例句
- High energy prices are a growing source of discontent.
能源價格過高是不滿的一個生長源頭。 - A pullback in oil could provide a boost to stocks, but Wall Street's jitters are not likely to let up until it sees a prolonged energy price decline.
石油價格的回落可提振股市，然而，華爾街的波動看上去不太可能讓股市上漲，除非能看到長時間的能源價格下跌。
