The pastpapers assuming consumer income to be evenly distributed use duopoly model for analyzing the impact on the social welfare caused by price ceiling.
以往文献在均匀分配假定下探讨价格上限对市场结构和社会福利的影响。
2
The papers keep trying to dredge up details of his past love life.
这些报纸老是翻出他以往爱情生活的琐事。
《牛津词典》
3
It is not permitted to sell or otherwise distribute copies of past examination papers.