This sounds like so much hot air, but the near $13 billion fortune this entrepreneur has amassed comes from practical achievements rather than hypothetical ones.
2018年6月六级真题（第三套）阅读 Section A
Today's demographics show that the middle class is disappearing and now the richest one percent of the population has amassed more wealth than the bottom 90 percent.
2018年12月六级真题（第一套）听力 Section C
柯林斯高阶英汉双解学习词典释义
VERB
积聚；收集
If you amass something such as money or information, you gradually get a lot of it.