昂贵的原料费用使价格居高不下。
他们一直人为地使糖价居高不下，以此为公司牟利。
They have kept the price of sugar artificially high and so fattened the company's profits.
中国经济增长改变了全球能源市场，并使中国消费的每样能源，从石油到铀再到其他自然资源的价格居高不下。
That growth has transformed global energy markets and sustained higher prices for everything from oil to uranium and other natural resources that China has been consuming.
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