设备学习是做好设备管理的基础和前提条件。
It is foundation and precondition of managing equipment well that the equipment is studied.
煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation.
中信证券说，与贝尔斯登的战略合作的基础和前提条件不再存在。
"The basis and preconditions for strategic co-operation with Bear Stearns no longer exist," Citic said.
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