红旗英语是red flag。
例句：
It's time to shake out the red flag.
是把这面红旗打开的时候了。
A red flag is a sign of danger.
红旗是危险的信号。
A red flag slowly went up the pole.
一面红旗徐徐升起。
The five-star red flag is fluttering in the wind.
五星红旗迎风飘扬。
英语解释：
a flag that serves as a warning signal
the emblem of socialist revolution
something that irritates or demands immediate action
red flag意思是示警红旗。
red flag：n.示警红旗;(象征革命或共产主义的)红旗。
读音：
美[ˌred ˈflæɡ]，英[ˌred ˈflæɡ]。
