恳请英文高手，翻译这三句话，十分感谢！

Over the years, the Chinese government has been promoting agricultural science and technology as a public good cause. As China's economic system from planned to market, the traditional agriculture to modern agriculture, agricultural technology extension services to the market system is not established. Agricultural products can be sold to the farmers faced the most headaches, irrational agricultural structures, poor quality of agricultural products, it is difficult to adapt to the development of the market economy, making traditional agricultural development forward.

Many in the last yearses, Chinese government of the agriculture science technique expansion always Be a kind of public-spirited business.Because the Chinese economic system turn to market from plan, the traditional agriculture changes direction a modern agriculture, but the agriculture science and technology expansion service system of the orientation market built up.The agricultural product coulds not sell to