The advent of new technologies has added about 4.2 million barrels per day to the crude oil market, contributing to a global over-supply.
新技术出现后，原油市场每天增加供应约420万桶，导致全球供应过剩。
Coal prices also are low, owing to over-supply and the scaling-down of demand, especially from China, which burns half of the world's coal.
因为供应过剩和需求下降，煤炭价格也很低，尤其是消耗了全球一半煤炭的中国的需求下降。
They are expensive to produce but cheap to reproduce and distribute, and therefore exhibit strong economies of scale with incentives to an over-supply.
它们的生产成本高昂，但再生产和销售的成本低廉，因而展现出强大的规模经济效益，并容易诱发供应过量。
The recent problems with DyStar production showed that a situation of over-supply and low prices can rapidly turn to one of shortages and rising prices.
德司达生产的近期问题表明，过度供应和低价的情况，可以迅速转化为一种短缺和价格上涨。
The recent problems with DyStar production showed that a situation of over-supply and low prices can rapidly turn to one of shortages and rising prices.
德司达生产的近期问题表明，过度供应和低价的情况，可以迅速转化为一种短缺和价格上涨。
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