美国经济在1922-1929年进入了繁荣的黄金时代，但是经济结构中仍然存在着根本的弱点，这是大危机发生最根本、最深刻的原因。

• The American economy stepped into a flourish time during 1922-1929. But there existed fundamental weakness in the economic structure, which caused the Great Depression.