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.

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。

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The work is repetitive, and the workers are regarded as a variable cost to be taken on or laid off as demand dictates.

这一工作是重复性的，并且工人被视为成本变量，根据需要增加或裁减。

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A purchase or production order that occurs at a regular interval and covers the variable demand during that period.

按固定时间间隔发出的采购或生产订单，包括期内变动需求。

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For example, rather than purchase expensive ultra-efficient motors, low cost opportunistic additions to old fans and pumps such as variable frequency drives and demand controls can deliver equal energy savings at a fraction of the cost.

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As more enterprises shut down their in-house data centers and turn to on-demand storage and computing services delivered via the Internet, their storage needs become more variable and less predictable.

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The report said the demand for broadband among deep rural residents was not being met and that many continued to experience variable mobile phone reception.

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