Progress in the development of renewables could be fragile, however, if fossil fuel prices remain low for long.

然而，如果化石燃料价格长期保持低位，可再生能源的发展进程可能会非常脆弱。

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Many species appear to remain unchanged in the fossil record for millions of years—a situation that seems to be at odds with Darwin's model of continuous change.

许多物种似乎在数百万年的化石记录中都保持不变——而这种情况似乎与达尔文的持续变化模型不一致。

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The report said that fossil fuels — especially from the major oil-exporting nations in the Mideast — will remain as the world's main energy source.

报告称，矿物燃料，特别是来自中东地区主要石油出口国家的矿物燃料，将继续成为世界的主要能源来源。

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As long as returns on fossil fuel stocks remain high (and subsidized by the lack of a price on carbon pollution), they will remain highly attractive to asset managers who must meet their duty to maximize returns.

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For the next 20 or 30 years, fossil fuels will remain dominant, supplying more than 85% of global demand for energy, and it is important to make them more environmentally friendly by putting more effort into reduced or zero emission fossil fuels.

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To get there, both the UN and global lending institutions such as the World Bank are saying that they will place more emphasis on green technologies than on fossil fuels, which will still remain part of its tool box and loan portfolio.

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