head number（马头号牌）是什么意思？音标发音+图解场景

马头号牌 /ˈhɛd ˈnʌmbə/ n

English: head number · 马头号牌

释义：Numbered plate that is attached to the horse’s head for identification by the public and the judges.

这个词出现在以下图解场景（1）