！rainbow是可数名词，rainbows中文意思是n. 怪物彩虹（游戏名称）

It was the biggest crow she had ever seen， plump and sleek， with rainbows shining in its black feathers.这是她见过的最大的一只乌鸦，它丰满而且光滑，黑色的羽毛闪烁着彩虹般的光芒。