多变效率是最重要的指标之一。

The polytropic efficiency is one of the most significant indicators.

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离心式压缩机组广泛应用于石油天然气工业领域，而多变效率是衡量该系统运行经济性的重要指标之一。

The polytropic efficiency is one of the most significant indicators which are used to judge the economical efficiency of the units.

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通过快速的存储和高效率的充电模式，电池可以很快的调节供应和需求之间的平衡，同时又可以吸收其他多变的能源，例如风能和太阳能。

By quickly storing and delivering charge, batteries could accommodate fluctuations in supply and demand, and help to incorporate variable sources of power such as wind and solar.

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