to understand this,we must first understand why birds have colors at all.
问题描述：
to understand this,we must first understand why birds have colors at all.
please translate it into Chinese,thank you very much.And the "at all 怎翻译?
答
为了明白这一点,我必须首先知道鸟儿有颜色的根本原因
我觉得 at all 要翻成 根本
但楼上似乎也有道理