Part of the reason is that wind power depends on, well, the wind. To safeguard against blackouts when conditions are too calm, officials have turned to coal-fired power as a backup.

部分原因是风力发电要以依靠风，为了防止“风平浪静”时出现的断电情况，官方不得不以火力发电作为后备电源。

youdao

It had been a calm, cool night in November (night before Thanksgiving, actually) and no wind.

当时是11月份，那晚宁静凉爽，没有风(那天是感恩节前夜)。

youdao

The flowing river showed minor ripples in the reflection, even though the wind was dead calm.

即使在那风平浪静的环境里，流淌的河流中，也会泛起了柔和的涟漪。

youdao

While he was in the rain, while it was raining so hard and the wind was blowing, he was praying that God will calm the water, calm the wind, so that he will be able to make it somewhere with his kids.

NPR: Succession Of Storms Cripples Haiti

Despite the wind and waves, an otherworldly calm pervades.

BBC: Ireland��s outlying islands

When it's not storming in the ITCZ, the weather can be completely calm, with little to no wind.

CNN: Airplane went down in volatile equatorial zone