释义 |
red flagˌred ˈflag noun [countable]  - All we needed was a red flag to warn the locals that we might be about to frighten the horses.
- It was a red flag, a symbol of an anti-education attitude.
- Volcanologists now recognize these oscillations as a red flag that a volcano is entering a dangerous phase.
American English something that shows or warns you that something might be wrong, illegal etc |