useful power

基本解释

If even a small proportion of this wasted heat could be converted to useful power, it would be a good thing.
如果把浪费掉的很小的一部分热能转换为有用的能量，这都是件好事。
Pattern matching is another feature found in many, if not most, functional languages, and offers some useful power.
模式匹配是许多（但不是大多数）函数语言中可以找到的另一个特性，它提供了一些有用的功能。
Based on this study , the formula for calculation of the useful power of a vibration mill is established by use of dynamic theory, and is verified by the experiment.
在此基础上，运用动力学有关理论，建立了振动磨机有用功率计算的表达式，并通过试验进行验证。

Similarly, attaching thermoelectric devices to the flues of power plants could generate more useful power.
ECONOMIST: Thermoelectrics
Consider that for every BTU of coal or natural gas burned in a combustion turbine only 35 percent of that is converted into useful power.
FORBES: Recycling Wasted Heat and Power Could Clear the Air
Such technology could be useful in power-sucking data centers and handheld devices with limited batter life, such as smartphone sand tablets, obviously.
FORBES: Intel Demonstrates Solar-Powered Processor