Cách sử dụng
The expression "be miles away" means to be lost in thought, daydreaming or not focusing on what's happening around you. It's usually used when someone seems distracted or not paying attention to their surroundings. For example, if someone asks you a question but you're not listening because you're thinking about something else, they might say "you seem to be miles away!" It's a casual expression and can be used in both formal and informal situations.