因为以辅音字母+o且指人的名词复数后加es，中文意思是n. 英雄（hero 的复数形式）

例如

The walls are hung with sepia photographs of old school heroes.这些墙上挂满了老牌英雄人物发黄的旧照片。

They called the event "a tribute to heroes，" which was a nice touch.