Dark clouds are often treated as precursor of a storm.

乌云通常被当作暴风雨的前兆。

In retrospect, clouds were gathering on the horizon.

回想起来，乌云已经开始在地平线上集结了。

What everybody echoes or in silence passes by as true today may turn out to be falsehood tomorrow, mere smoke of opinion, which some had trusted for a cloud that would sprinkle fertilizing rain on their fields.

在今天人人附和或以为不妨默认的真理，很可能在明天变成虚无缥缈的氤氲，但还会有人认为是乌云，可以将一阵甘霖洒落到大地上来。

Behind them, in the west, the crimson and orange were almost faded; a dark bank of cloud had crept into the zenith.

他们背后，西方的深红与橘红已然淡去，漠漠的乌云爬上了天顶。

There are a lot of dark clouds.

有好多乌云。

The black cloud carries the sun away.

乌云卷走了太。

If there are dark clouds, we can expect rain.

如果有乌云，我们预计会下雨。

The rain was still falling, but the darkness had parted in the west, and there was a pink and golden billow of foamy clouds above the sea.

雨还在下，可是西方的乌云已经拨开，海湾上空翻滚着粉红色和金色的云霞。

The small cloud on the horizon had blown up swiftly into a large, sullen storm cloud and it was as though a faint, chilling wind blew from it.

如今天边那片小小的乌云已经迅速扩大，阴沉沉地酝酿着一场暴风雨，仿佛一阵不祥的冷风已隐隐吹过来了。

Why don't you just look up in the sky and see if it is cloudy?

你为什么不抬头看看天空看看是否乌云密布？

A thousand live bats fluttered from the walls and ceiling while a thousand more swooped over the tables in low black clouds, making the candles in the pumpkins stutter.

一千只蝙蝠在墙壁和天花板上扑棱棱地飞翔，另外还有一千只像一团团低矮的乌云，在餐桌上方盘旋飞舞，使南瓜肚里的蜡烛火苗一阵阵扑闪。

Storm clouds already gathering over new PM Liz Truss after narrow win.

在险胜后，新首相莉兹·特拉斯的头顶已经乌云密布。

And it's this horrible dark cloud above my head now.

这是密布在我头上的沉沉乌云啊。

Black clouds were making the sky very dark.

乌云使天空变得黑压压的。

Black clouds hurried across the sky, and the trees moved wildly in the wind.

乌云在天空中匆匆飘过，树在狂风中猛烈地摇摆。

I thought it would rain. There were heavy clouds this morning.

我还以为要下雨呢， 早上有很多乌云的呀。

And from my window I can see that it's very overcast and dark overhead.

透过我的窗户，我可以看到天气是多云的而且乌云密布。

It cuts through clouds and darkness to brighten the day.

它穿透乌云和黑暗，照亮白昼。

No, it's not raining now. But the sky is still very cloudy.

现在不下了。但是天空仍然是乌云密布。

But when clouds darken, Raiju leaps into action alongside Raijin, the Shinto god of storms.

然而，当乌云聚集时，雷兽会配合神道的雷神行动。