Cách sử dụng
A helicopter is a kind of aircraft that flies in the air and can stay in one spot without moving forward. It has a big propeller on top that spins around and helps it fly. People often use helicopters in emergencies or for transportation to places that are hard to get to by car or on foot, like on top of tall buildings or in remote areas. When you talk about a helicopter, you might say things like "I saw a helicopter flying over my house" or "The rescue team used a helicopter to get to the stranded hikers."