[, ]something that makes it difficult or impossible to do sth, especially for people to communicate with each other（尤指与人沟通方面）难以逾越的屏障；严重障碍◆He was accused of erecting a Chinese wall between shareholders and the board.他被指控在股东和董事会之间造成难以逾越的沟通障碍。⨁to create / erect / raise a Chinese wall建立／设置／提高沟通屏障 () a set of strict rules that prevent one department of a stock exchange business passing secret information to another department that could result in the information being used illegally in order to gain money长城（一套严格的规则，用以隔离投资银行部门与研究、销售等部门之间的信息，防止不法地利用有关信息获利）◆Wall Street insists that a Chinese Wall separates its research and its investment banking activities.华尔街坚持用长城将研究与投资银行活动分隔开。➡insider trading ⨁to create / erect / raise a Chinese wall建立／设置／提高防火墙