到18世纪末、19世纪初，人类开始使用从蒸汽和煤中获得的能量，用以驱动机器，继而导致物品的大规模生产，一派欣欣向荣的景象。
Starting in the late 18th and early 19th century, humans harnessed the power of steam and coal to run machines, and the result was an explosion of material abundance.
本文利用能量扰动法得到具边界记忆项波动方程初边值问题解的指数衰减性。
The exponent decay of solution of wave equation with boundary memory is obtained by the energy method.
初看起来，似乎所有通过小孔的电子都会具有相同的能量。
At first sight it might seem that all electrons which pass through the hole will have the same energy.
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