您要查找的是不是：
- Dark clouds denote rain. 乌云是下雨的预兆。
- Dark clouds denote a coming storm. 黑云表明风暴要来临。
- Dark clouds denote that a storm is coming. 黑云表明风暴要来临。
- Dark clouds denote that a storm is coming . 黑云表明风暴要来临。
- Dark clouds denote a coming storm 黑云表明风暴要来临。
- Dark clouds are a sign of rain or snow. 乌云是雨或雪将至的预兆。
- The banks of dark cloud promised rain. 天上片片乌云，就要下雨了。
- Dark clouds massed, and we expected rain. 乌云密布，我们预料要下雨了。
- Dark clouds were gathering in the sky. Heavy rain would come soon. 乌云密布，大雨就要来临。
- Dark clouds massed, and I expected rain. 乌云密布，我预计要下雨。
- The dark clouds were a guarantee of rain. 乌云是下雨的先兆。
- There were dark clouds overhead promising rain. 天上乌云密布，预示就要下雨。
- There were masses of dark clouds in the sky. 天上有朵朵乌云。
- Look at the dark clouds! It's going to rain. 看那乌云,天要下雨了。
- Look at those dark clouds; it's going to rain. 看那些乌云,要下雨了。
- The dark clouds brought a threat of rain. 乌云预示着要下雨。
- There are dark clouds in the sky. 天空乌云密布。
- The moon peered from behind dark clouds. 月亮在浓云后面若隐若现
- The dark clouds suggest an impending storm. 乌云表明暴风雨即将来临。
- The sky became suddenly covered with dark clouds. 天空突然变得乌云密布。
