But the same period has also been an era of rapid technological change. The United States is undergoing a third industrial revolution, an information-age upheaval that could be as momentous as its predecessors, which transformed society through the introduction of steam, iron, cotton, and machinery, and then internal combustion, electricity, and steel.
但同样是这一时期，也是科技快速变化的时期。美国正在经历第三次工业革命&mdash;&mdash;信息时代的崛起可能与此前工业革命一样动力十足&mdash;&mdash;先是蒸汽、铁、棉花和机械；接着是内燃机、电力和钢铁，它们都改变了社会。