1.
Clouds map it up at times.
有时天空乌云密布。
2.
The sky became suddenly covered with dark clouds.
天空突然变得乌云密布。
3.
The sky was grey and the clouds were heavy and low.
天空阴沉，乌云低矮。
4.
Those dark clouds will probably bring rain.
那片乌云很可能要降雨。
5.
A cloud is broodingover the hills.
一片乌云笼罩着山岗。
6.
Do dark clouds signify rain?
有乌云是否显示要下雨?
7.
The moon was oBscured By dark clouds.
月亮被乌云遮住了。
8.
Dark clouds were gathering in the sky. Heavy rain would come soon.
乌云密布，大雨就要来临。
9.
dark clouds scudding by.
黑黑的乌云滚滚而来
10.
By and by the clouds disappeared.
乌云不久便消散了。
11.
a violent wind was howling and dark clouds were scudding across the sky.
狂风怒号，乌云滚滚。
12.
Dark clouds denote rain.
乌云是下雨的预兆。
13.
Black clouds are an unmistakable sign of coming rain.
乌云是下雨的明显前兆。
14.
The dark clouds mean rain.
乌云是下雨的征兆。
15.
A wary glance at the black clouds.
谨慎地瞥了一眼乌云
16.
Lightning streaks from cloud to cloud.
闪电划过朵朵乌云。
17.
Black clouds floated by in the sky.
乌云从天空中飘过。
18.
Black clouds portend a storm.
乌云为暴风雨的前兆。