While renewable energy resources have been dismissed for intermittency, the causes of variations in solar resources (e.g. diurnal cycles, cloudiness, etc.) are well understood and fairly predictable.

• 虽然可再生能源由于具有间歇性的缺点而遭忽视，但是人们已经充分了解了太阳能资源的这种波动（如昼夜交替、阴天等情况），并可以做出相对准确的预测。