() () ˌbrand deˈvelopment ˌindexa measure of how well a particular type (brand) of product sells in a particular area compared to the whole country 品牌发展指数（特定品牌产品在特定地区而不是全国的销售状况的衡量标准）◆Where there is a low BDI, there may be an opportunity to build the brand. 品牌发展指数低的地方可能存在建设品牌的机会。