求翻译：《胡佛传》以美国政坛传奇人物埃德加-胡佛的生平为蓝本，埃德加-胡佛1924年被任命为美国调查局的局长，1935年借迪林杰案件的机会他把调查局改组成为“联邦调查局(FBI)”，随后开始长达半个世纪的FBI“掌权人”的生涯，直至1972年去世。是什么意思？

The biography of Hoover in United States politics modelled on the legendary Edgar-Hoover's life, Edgar-1924, Hoover was appointed as United States Secretary of the Bureau of investigation, Dillinger case occasion, 1935 he was restructuring to become Bureau "Federal Bureau of investigation (FBI)", then started half a century-long FBI "power man" life until death in 1972.