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E.g. the sky is full of forbidding thunderclouds .

天空布满了令人生畏的雷雨云。

Lenticular clouds can also be caused by other speed bumps , such as tall thunderclouds , but because they often form on the downwind sides of mountains , they are also known as lee clouds , wave clouds or lee wave clouds .

荚状云也可以由其他的减震器引起，比如说高的雷雨云，但是因为它们通常形成在山的顺风面，它们也被称为背风云，波云或下风波云。

During the sultry afternoons , we took refuge by the fan-shaped pool , gazing at the thunderclouds rolling in with only the rasping of cicadas interrupting the silence .

在闷热的午后，我们躲到了扇形的池塘旁，凝望着滚滚而来的雨云，只有知了刺耳的叫声打破寂静。