简答题 翻译：Of primary importance is the fact that the prognosis represents a firm commitment as to drilling engineers ultimate responsibility.

翻译：Proper planning of any drilling venture is the key to optimizing operations and minimizing expenditures. 点击查看答案

翻译：Petroleum may be defined as a naturally occuring, complex mixture of hydrocarbons which may be either gas, liquid, or solid, depending on its own unique composition and the pressure and temperature at which it is confined. 点击查看答案