基本解释[机械工程]乡郊扩展区英汉例句双语例句It also puts forth the problems to be paid attention in the process of extension in the rural area and the object model for future development.并提出了在农村推广过程中应注意的问题和未来发展目标模式。rural extension area更多例句专业释义机械工程乡郊扩展区