Melancholy is a black cloud which can change one's state of mind!

Storm-cloud ( large black cloud coming with a storm or indicating that a storm is likely to happen) It is legitimate to envisage a more or less one-to-one correspondence between cloud nucleus concentration and the concentration of cloud droplets.

暴风云（暴风雨时出现的或预示暴风雨将至的浓密的乌云）.拟想云核浓度与云滴浓度之间有或多或少的一一对应关系是合理的。

Morning dew cannot stand being sunned; black cloud cannot shade up the sun. The sun arose in the northeast-at least the day dawned in that quarter, for the sun was hidden by gray clouds.

太阳从东北方升了起来&至少也得说那个方向出现了曙光，因为太阳给乌云遮住了。

Then, all of a sudden, we've seen like a black funnel cloud.

然后，突然间，就看见像漏斗一样的黑云。

The consciousness of one's own body puffs itself up from this region of domain until there is a black cloud around certain parts of the etheric body.

身体的意识将其膨胀，直到有一块黑云笼罩在以太身体的某部分。

You see this dark black cloud hovering over the surface of Earth?

能看见这盘旋在地表的深黑色的云吗？

Everywhere he. went ， he carried his unhappiness with him like a black cloud.

他每到一处，情绪总是忧郁的，像被一团黑色的云笼罩着。

A black cloud appears over the castle.

乌云出现在城堡的上方。

A minute later, it's clear that earthmover is firing up its engine since a big, black cloud is billowing out of its skyward-pointing exhaust pipe.

稍一会后，推土机朝上的排气管翻腾出阵阵浓烟，很明显推土机发动了。

White clouds crowned the hills.

山顶上白云缭绕.

The white cloud drops tears; let me awaken the love rainbow line reaches to the heaven.

白云落下泪水, 让我唤醒爱的彩虹线通天堂.

That is always mountain and white cloud no matter how he is frustrated, in the distance.

无论再多的不如意,总是远山与白云, 那个远方.

White Cloud Restaurant at your service.

白云酒店竭诚为您服务.

That end in heavy mountain white cloud.

在大山白云的那端.

Come on, look, little white cloud is flying.

看呀看呀, 小白云飞起来了.

Only the slice slice the white cloud send to fondly mutually.

只有那片片白云送去相互的思念.

The yellow sand rises as high as white cloud.

黄河远上白云间.

How about White Cloud Monastery?

上白云观?

The white cloud of smoke floated away.

白色的烟雾飘远了。

It will probably rain because there is a dark cloud approaching.

天可能要下雨,因为飘来了乌云. (表直接理由)

If the dark cloud clears off, we'll go th the park.

如果天色转晴, 我们就到公园去.