风能产业在3月份迎来了第一个“跟头”：石油巨头壳牌退出了一系列风能、太阳能和水力发电项目，因为他们认为(随着油价的下跌——译者注)这些产业已难以产生效益。
The first big hurdle for wind cropped up in March, with oil company Shell pulling out of wind, solar and hydro power because it felt they were not economic.
将核能同水力，石油，天然气、煤等能源进行了比较和估价。
Nuclear power is evaluated against hydro -, oil -, gas - and coal - power.
利用水力旋流器对渣油进行高温液固分离，研究了高温工况下渣油的物理性质和石油化学成分对分离性能的影响。
And the influence on the separation efficiency of hydrocyclone was studied owing to the physical property and the petroleum chemical ingredient of the residue.
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