translation.en: Samuel Clemens, Mark Twain, was a big investor in the most complex machine of all times -- at least until 1918 -- registered with the U.S. Patent Office.
translation.zh: 萨缪尔·克莱门斯，马克·吐温 是个大发明家 发明了最复杂的机器-- 至少在1918年前是的-- 在美国专利局注册