blue-flag

美 
英 
  • n.蓝旗(赛车中用以示意后方有领先车手试图超车)
  • 网络蓝菖蒲;蓝旗海滩;蓝旗奖
blue flag
n.
1.
蓝旗(赛车中用以示意后方有领先车手试图超车)a blue flag used in motor racing to show that a driver who is much further ahead is trying to pass
2.
(为欧洲清洁安全的海滩颁发的)“蓝旗”奖an award given to beaches in Europe that are clean and safe

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