yellow flag
noun /ˌjeləʊ ˈflæɡ/
/ˌjeləʊ ˈflæɡ/
- a type of yellow iris (= a flower) that grows near water
黄鸢尾;黄菖蒲 - a yellow flag on a ship showing that somebody has or may have an infectious disease (= one that can spread easily)
(表示船上有疫情而挂起的)检疫旗,黄旗