The choice of whether to reuse or not pay until you need the resources is now yours, but you no longer need to have the spare capacity there, waiting for the "just in case" situation to occur.

您可以选择重用资源，或者直到需要时再购买资源，但是不再需要保留备用容量 “以防万一”。

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Also suppliers in the Opec group of producing nations are pumping at their highest rate in a quarter century, with not much in the way of spare capacity to make up any shortfalls.

BBC: NEWS | Business | Wall Street giants see oil rising

Since Japan lacks both oil and natural gas, keeping the lights on in Tokyo is going to mean bringing most if not all of that spare capacity back online, and that will require importing more petroleum to fuel the plants.

FORBES: Japanese Oil Demand Likely To Jump

Barclays Capital thinks the OBR overestimates spare capacity in the economy and that planned spending cuts will not be enough to eliminate the structural deficit.

ECONOMIST: The government paints a clearer picture