The online measurement of the steam quality is a difficult problem of world in petroleum industry, because of high temperature and high pressure of steam and narrow space of steam injection well.
注汽过程中高温高压和狭小的空间，使得干度在线测量成为石油开采行业中的世界性难题。
Substituting for petroleum by a new power energy is a common research topic in all automotive industry countries in the world.
用新型动力能源取代石油是世界各国汽车工业共同研究的课题。
In the traditional industrial economy system, the petroleum has been regard as "blood of industry", and it is in the predominant position in the energy consumption since the World Wall II.
在传统工业经济体系中，石油一直被称为“工业的血液”，并在战后世界能源消费构成中居于主导地位。
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