《世界上最强大的念头：一个关于蒸汽、工业和发明的故事》一书的作者是威廉·罗森。
The Most Powerful Idea in the World: A Story of Steam, Industry, and Invention. By William Rosen.
《世界上最强大的念头：一个关于蒸汽、工业和发明的故事》一书的作者是威廉·罗森。
The Most Powerful Idea in the World: A Story of Steam, Industry, and Invention.By William Rosen.
事实上，杜·波依斯经常在华盛顿和威廉·特罗特等对抗主义者之间转变立场。
In fact, however, Du Bois often shifted positions along the continuum between Washington and confrontationists such as William Trotter.
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