In the fourth chapter, we studied the iridescence phenomena of the green and purple feathers on the neck of pigeon.

第四章中，我们研究了鸽子颈部绿色和紫色羽毛的虹彩现象。

Pigeon and green stand for peace.

鸽子和绿色象征着和平。

Other names for this bird are Celebes Imperial Pigeon, Celebes Green Imperial Pigeon and Green Imperial Pigeon.

其它名字对于这只鸟是Celebes 皇家鸽子， Celebes 绿色皇家鸽子和 绿色皇家鸽子。