Roughly five and a half million foreign workers play an important role in the Saudi economy, for example, in the oil and service sectors.
大约由550万名外籍工作者在沙特经济中起了重要的作用，例如，在石油和服务部门中。
Speculators do play an important role in setting the price of oil and other raw materials.
投机商在石油和其他原料的定价上的确起着很重要的作用。
Petroleum equipments play an important role in the production of oil field, the management and operation of these equipments have direct impacts on the oil output and the enterprise's profit.
石油设备是油田生产作业的重要组成部分，这些设备的管理与运行直接关系到石油产量和企业的经济效益。
The qualitative and quantitative analysis play an important role in separation, refining and further processing of wash oil.
定性和定量分析在洗油的分离精制和深加工过程中起着重要的作用。
Complicated fault-block oil fields being an important part of crude oil reservoirs play an important role in oil and gas fields development.
复杂断块油藏作为原油储层重要的组成部分，在油气田开发中占有相当重要的地位。
The evaluation and prediction of the reservoir production capacity play an important role in the exploration and development of an oil field.
油气储层产能评价与预测对于油气田的勘探与开发有着重要的意义。
Because of the oil field nature condition and the requirement of the production management, vehicles play an important role in the oil field production.
由于油田所处的自然条件和油田生产的需要，生产车辆在油田生产中起着十分重要的作用。
The research in this article play an active assistant role to the study of modeling of anode baking heavy oil transportation, presents real worthy reference to productivity.
本文的研究工作对于研究阳极焙烧重油输送系统的建模，起到积极的推动作用，同时对于生产实践具有实用和参考价值。
The knowledge. developing trend and the correct application of vehicle brake oil is introduced in this paper. It will play an important part in ensuring vehicle for safety travel.
本文就汽车制动液的有关知识，发展趋势和正确使用方法作了较详细的介绍，对于保障汽车行驶安全有一定的意义。
Polymer flooding has came into the phase of industrialization application in Daqing oil flied, the indexes prediction of polymer flooding development play an important role in program development.
大庆油田聚合物驱油已进入工业化应用阶段，聚合物驱油开发指标预测对油田开发规划起重要作用。
Experimental methods is mainly applied to analyze oil spills from tanker in this paper, The analysis results play an important part in controlling oil spills from tanker.
本文主要运用实验方法对破舱船舶溢油事故进行了分析，其分析结果对控制船舶溢油具有一定的指导意义。
The history of international co-operation on currencies is patchy. But China and the oil-rich Gulf states have ample reason to play their part in an orderly decline of the dollar's dominance.
国际间货币方面的合作历史不是很集中，但是中国和其他富裕的产油国已经有足够的理由在美元主导地位有秩序地下降过程中扮演重要的角色。
Through further researches imaging well logging will be perfect and pre - dominate in well logging technologies. It will play an important role in oil and gas exploration and development.
成像测井通过研究不断完善、进步，将成为主流测井技术，在油气勘探开发中发挥重要的作用。
In the first half of the 20th century, Standard Oil to help meet China's energy demand play an important role.
在20世纪上半年，标准石油为帮助满足中国的能源需求发挥了重要作用。
However, in research of water hydraulic axial piston pump, inertia items should play an important role because the viscosity of water is much less than that of oil.
然而，在水压轴向柱塞泵的研究中，由于水的粘度比油的粘度小得多，因此，惯性项就起着较大的作用。
Adequate levels of omega-3 found in fish oil have been found to play an important role in healthy brain function and assisting and maintaining healthy behaviour, temperament and learning.
鱼油当中含有充分的欧米茄3，有助大脑安康发育，以及有助坚持优良的脾气和举动、进修才能。
The bottom of the electric casting tank is provided with an exhaust pipe which is besprinkled with tiny holes, and oil-free compressed air are put in the exhaust pipe to play stirring action.
在电铸槽底部设一布满微孔的排气管，并通入无油压缩空气起搅拌作用；
It is the translocation system that play an important role in heterogeneous source reservoirs. And that oil layers distributed along translocation layers, and so formed m...
该储层属于它源型油气藏，输导体系起着重要的作用，油层多沿输导层分布，形成上下叠置的复式油气藏。
It is the translocation system that play an important role in heterogeneous source reservoirs. And that oil layers distributed along translocation layers, and so formed m...
该储层属于它源型油气藏，输导体系起着重要的作用，油层多沿输导层分布，形成上下叠置的复式油气藏。
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