“underground economy”的概念、定义、翻译、参考文献-科学参考

单词	underground economy
释义	underground economy Encyclopedia 经济学地下经济释 underground economy地下经济逃避政府的管制、税收和监察，未向政府申报和纳税，其产值和收入未纳入国民生产总值的所有经济活动。涉及生产、流通、分配、消费等各个经济环节，可谓无所不在。是当前世界范围内的一种普遍现象，被国际社会公认为“经济黑洞”。
随便看	closed channel closed circuit hydraulic system closed circular DNA closed circulating water system closed class closed combinatorial surface closed communication structure closed complex closed complex plane closed composition closed cone closed contour closed convex function closed convex functional closed convex hull closed convex hypersurface closed convex set closed convex surface closed covering closed current closed curve closed-curve problem closed cycle closed cycle engine closed-cycle refrigerator

科学参考收录了854744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。