Cách sử dụng
"Cirrus" is a word used to describe a type of cloud. These clouds are thin, white, and wispy, and they often form at high altitudes in the sky. If you look up on a clear day and see some long, thin clouds that look like feathers, those are probably cirrus clouds. You can use the word "cirrus" when you're talking about the weather or when you're describing the clouds you see in the sky.