- 天空烏雲密布， 電光在雲塊間閃動。
The sky was overcast, the ligtning leaped from cloud to cloud.
- 早上還是烏雲密布，下午就放晴了。
The sky was black this morning but then it brightened up in the afternoon.
- 烏雲密布，要下雨了。
The clouds brought a threat of rain.
- ＂天空烏雲密布，我們看得出快來暴風雨了。＂
The sky clouded over; we could see there was going to be rainstorm.
- 天空烏雲密布, 很快便下起雨來。
The sky blackened and soon it began to rain.
- 天空烏雲密布，波濤掀起白色的浪花。
Dark clouds were gathering in the sky;big waves threw up white foam.
- 烏雲密布，要下雨了。
The clouds brought a threat of rain
- 寒冷陰沉的一天，烏雲密布。
It was a cold, dark day, the sky overcast.