The phenomenon of hitherto rapidly growing national economies stagnating at middle-income levels and failing to graduate into the ranks of high-income countries. See Aiyar et al. (2013) IMF Working Paper No. 13/71.
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。