a blue flag used in motor racing to show that a driver who is much further ahead is trying to pass
an award given to beaches in Europe that are clean and safe
lá cờ xanh
/ˌbluː ˈflæɡ//ˌbluː ˈflæɡ/a blue flag used in motor racing to show that a driver who is much further ahead is trying to pass
an award given to beaches in Europe that are clean and safe