人民，只有人民，才是创造世界历史的动力。
The people, and the people alone, are the motive force in the making of world history.
设计师，只有原创设计师，才是创造设计历史的动力。
The designer, and the originalism designer alone, is the motive force in the making establishing the history of design.
随后，蒸汽动力登上了历史舞台，让整个水力发电的前景一度遭到了怀疑。
Then steam power entered the scene, putting the whole future of waterpower in doubt.
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