Engine revolution should not exceed the maximum permissible.

发动机的转数不应超过所允许的最大值。

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Then the author analyses the effect of the frame vibration and tries to make the natural frequency of vibration beyond the range of engine revolution rate.

分析了发动机振源对车架振动的影响，使车架主要模态的自振频率避开了发动机转速范围；

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Simulations about reducing noise excited by engine revolution are done by laying secondary source at proper places on the simplified finite element model of a passenger car.

根据所得结论，在简化的客车有限元模型上的适当位置安放次级声源，对因发动机振动激励引起的噪声进行车内有源消声的仿真分析。

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What the Market Revolution was, in so many ways, was an engine, a tremendous Charles Sellers has written a famous book on this it was a tremendous engine for what became arguably the most prevalent idea of the entire nineteenth century in America, and that's the notion of progress.

在很大层面上,市场革命,就是一个巨大的发动机,查尔斯·塞勒斯,曾经为此写过一部书,市场这个巨大的发动机,它带来了十九世纪最流行且有争议的看法,即,对进步的观念

耶鲁公开课 - 美国内战与重建课程节选

The innovation and wealth graph tilts up a bit during the Renaissance and again after the steam engine launched the first Industrial Revolution.

FORBES: Magazine Article

The innovation and wealth graph tilts up ever so slightly during the Renaissance and then tilts again after the steam engine launched the first Industrial Revolution.

FORBES: How The Cheap Revolution Confuses Policymakers

It bends upward again with the second industrial revolution of the late 1800s built on the internal combustion engine, electricity and telephony.

FORBES: How The Cheap Revolution Confuses Policymakers