(maybe this article is analyzing why ostriches have long neck in the previous sentence.) that analysis also explains why birds that are so much different from ostriches,such as flamingoes and storks,also have long necks.But this theory doesn't fit for robin,which doesn't have long neck.
拿长颈这一特征来说,你会发现这个理论(THIS)也适用于(从生物学上)与ostriches差别远到象flamingoes 和 storks 一类的鸟类.(robin是个例外)