基本解释[经济学]铁路技术改造英汉例句双语例句In the field of railway construction in China, innovation and improvement in technology are always the top of the priorities.在我国铁路建设中,技术创新、技术改造的工作历来都是国家铁路建设的重点。improvement in railway technology更多例句专业释义经济学铁路技术改造