ソース:[1] First Amazon conquered retail. Now it’s quietly building a $35 billion business that’s changing how companies operate. (https://www.marketwatch.com/story/first-amazo ...)[2] Inside the $35 billion-plus marketplace powering Amazon's B-to-B growth - Modern Retail (https://vertexaisearch.cloud.google.com/groun ...)[3] Amazon Business still dominates B2B marketplace industry - Digital Commerce 360 (https://vertexaisearch.cloud.google.com/groun ...)