A business which is regarded as contributing to national security and/or national prestige. It is often believed by governments that flag carriers, such as national airlines, should be supported whether or not they are economically viable.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。