马富才指出，为改善能源结构和人类生活环境，许多国家都经历了煤炭—石油—天然气的优质能源转换过程。

Ma said in order to improve energy structure and human living environment many countries have undergone the process of energy transfer from coal to oil and then to natural gas.

石油作为优质能源和宝贵的化工原料, 与生物技术的关系也越来越密切.

Petroleum, a kind of quality and valuable industrial chemical, has very close relationship to biological technology.