求翻译：研发和推出一系列有商业应用价值的环保、节能型的混合动力电动汽车已经并将在相当长时间内成为世界汽车工业发展的主流和趋势是什么意思？

R & D and launch a series of commercial applications in environmental protection, energy-efficient hybrid electric vehicle has and will become the mainstream of development and trends of the world automobile industry for quite some time

R&D and introduction of a series of environmentally friendly commercial applications, energy-efficient hybrid electric vehicle has been and will be in a very long time in the world in the mainstream of the development industry and trends

Will research and develop and promotes a series of has the commercial use value environmental protection, the energy conservation mix power electric automobile already and becomes the world automobile industry development in the quite long time the mainstream and the tendency

Development and launch of a series of commercial value of environmental protection, energy-efficient hybrid electric vehicles have been and will be for a long time become the mainstream of world automotive industry development and trends

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