求翻译：我国于1985年开始全面制定并采用出口退税政策，该政策的发展历经了形成、上调、下调以及结构性调整四个阶段，为我国的对外贸易发展做出了重要贡献。是什么意思？

China in 1985, the full development and use of export tax rebate policy, the development of the policy after the formation of raised, lowered, and the structural adjustment of the four stages, made an important contribution for the development of China's foreign trade.

正在翻译，请等待...

Our country started in 1985 to formulate and to use the exportation tax reimbursement policy comprehensively, this policy development had been through repeatedly has formed, the upward, the decline as well as the constitutive property adjusts four stages, has made the important contribution for our

Started comprehensive preparation and adoption of export tax rebate policy in 1985, after the formation of the policy development, upward, downward and the structural adjustment of the four stages, has made important contributions to China's foreign trade development.

正在翻译，请等待...