Take , for example , the intermittency of wind power .
以风能的间歇性为例说明。
The main problem with both wind and solar energy is not their cost ( which is falling satisfactorily with every passing year ) but their intermittency .
风能与太阳能发电装置的造价每年都在持续下降，因此使用它们的主要问题不是成本，而是无法持续发电。
For grid operators trying to balance a portfolio of different power sources , intermittency is no longer an abstract statistical anomaly , but determines whether they can keep the lights on .
With increasing use of smart meters , which mitigate the problem of intermittency that plagues renewable forms of energy , demand for rooftop installations should grow strongly in these places .
