Cách sử dụng
A dune is a big hill of sand formed by wind or water in deserts or coastal areas. You might see dunes at the beach, where the wind helps create hills of sand that can be really fun to climb or sled down. You can also find dunes in desert areas where there isn't much vegetation. So, when you're talking about a big hill of sand formed by wind or water, you can use the word "dune".