a red flag
英 /ə red flæɡ/
中文释义
危险信号（恋爱）
A warning sign that something might be wrong or concerning.
常用搭配
- a huge red flag巨大警讯
- that's a red flag这是危险信号
- so many red flags一堆危险信号
例句
- He got jealous fast, and that's a red flag.他很快就吃醋,这是个危险信号。
- Constant excuses from a vendor are a red flag.供应商不停找借口是个危险信号。