In the meantime, the reserve margin—the excess of generation capacity overpeak demand—has shrunk to about 8%, compared with the international standard ofat least 15%.

同时，电源储备量——超过峰值需量的额外发电容量——已减少了8％，而国际标准是至少15％。

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If the forecast differs from the actual generation, the shortfall must be met by using reserve capacity.

ECONOMIST: Wind farms