Perceived risks短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 感知风险 The perceived risks and uncertainties about sustainably funded demand from developing countries often leads to underinvestment in development and manufacturing of appropriate products. 发展中国家对可持续资金需求的风险性和不确定性常常导致相关产品开发和制造方面投资不足。 who