这些投机客加剧了价格的波动，因为他们通过竞价拉升了本就处于高位的价格，并在这些价格处于低位的时候进一步降低了价格。
These speculators exacerbated the fluctuations in prices since they helped bid up oil prices further when they were high, and helped lower them further when these prices were low.
在这些采购中，价格只是许多需要考虑的关键因素之一。
With such purchases, price is only one of many crucial factors to consider.
但安德森说，在这些改进影响市场价格前还需要一段时间。
But Anderson says it will take time before those improvements impact market prices.
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