Of course, retailers could learn from all this, when test marketing new products.
当然，零售商测试销售新产品时，能够从这一切中学到东西。
英语百科
Test market
（重定向自Test Marketing）
A test market, in the field of business and marketing, is a geographic region or demographic group used to gauge the viability of a product or service in the mass market prior to a wide scale roll-out. The criteria used to judge the acceptability of a test market region or group include: