乌云滚滚 meaning in English

dark clouds lour.; dark clouds are scudding across the sky

The sky writhed with clouds .
天空里乌云滚滚。
The sun burst through after the clouds rolled away
乌云滚滚而去后，太阳破云而出。
It was six o clock in the morning
天空灰蒙蒙的，乌云滚滚。已经六点钟了。
The moon , on the wane , scarcely left the horizon , and was covered with heavy clouds ; the height of the trees deepened the darkness
这时，半圆的月亮刚刚离开乌云滚滚的地平线。那些高耸入云的大树越发增加了这种黑暗的气氛。