Clouds are an important part of the weather system. They come in many shapes and sizes, and they can tell us a lot about the weather. The most common type of cloud is the cumulus cloud. These are the fluffy white clouds that look like cotton balls in the sky. They form when warm air rises and cools, forming droplets of water that form into clouds. Cumulus clouds usually indicate fair weather, but if they become too thick they can bring rain or thunderstorms. Stratus clouds are a grey blanket of clouds that often cover the sky. These clouds form when warm air is trapped near the ground and cools, forming a layer of clouds. Stratus clouds usually indicate rain or snow, but they can also bring fog or mist. Cirrus clouds are thin and wispy clouds that look like strands of hair in the sky. These clouds form high in the atmosphere when cold air rises and forms ice crystals. Cirrus clouds usually indicate fair weather, but if they become too thick they can bring rain or snow. Cumulonimbus clouds are tall thunderclouds that look like mountains in the sky. These clouds form when warm air rises quickly and forms droplets of water that form into thunderclouds. Cumulonimbus clouds usually indicate thunderstorms or heavy rain. No matter what type of cloud you see in the sky, it can tell you something about the weather. Clouds come in many shapes and sizes, and they can give us clues about what kind of weather we will have today.

云是天氣系統(tǒng)的重要組成部分。它們有很多形狀和大小，它們可以告訴我們很多關(guān)于天氣的信息。最常見的云是積云。這些是蓬松的白云，在天空中看起來像棉花球。當(dāng)暖空氣上升和冷卻，形成水滴，形成云時(shí)，它們就形成了。積云通常預(yù)示著晴朗的天氣，但如果積云太厚，就會(huì)帶來雨或雷暴。層云是經(jīng)常覆蓋天空的灰色云層。這些云形成時(shí)，溫暖的空氣被困在附近的地面和冷卻，形成一層云。層云通常預(yù)示著雨或雪，但它們也能帶來霧或薄霧。卷云是薄而小的云，看起來像天空中的頭發(fā)絲。當(dāng)冷空氣上升時(shí)，這些云在高空形成冰晶。卷云通常預(yù)示著晴朗的天氣，但如果它們變得太厚，就可能帶來雨或雪。積雨云是高大的雷云，看起來像天空中的山脈。當(dāng)熱空氣快速上升并形成水滴形成雷雨云時(shí)，這些云就形成了。積雨云通常表示有雷暴或大雨。無論你在天空中看到什么類型的云，它都能告訴你一些關(guān)于天氣的信息。云有許多形狀和大小，它們可以給我們提供今天天氣的線索。