large-sampleCOCA²⁴⁴⁹⁴⁸BNC¹⁷³⁹⁹⁵⁺² 基本例句 un.大样品；🌏大样本z检验 In order to validate utility of risk- relievers in electronic buying situations in China, a large-sample empirical study has been conducted for book and cloth. 以书籍和服装作为搜索型和体验型商品的代表，通过网上模拟实验调查的方式对主要风险降低策略在中国的有效性进行了实证检验。 cnki