altocumulus undulatus

例句：

1. 1.The weather forecast predicted a high-altitude cloud formation.
   天气预报预测到了一个高层云朵。
2. 2. The altocumulus undulatus was a beautiful sight in the sky.
   高层云朵状在天空中是一道美丽的景色。
3. 3. The altocumulus undulatus is responsible for the precipitation in some areas.
   高层云朵状负责某些地区的降水。