Because neither chimpanzees nor any of the other 220 species of nonhuman primates have whites of the eyes, at least not that can be easily seen.
Because neither chimpanzees nor any of the other 220 species of nonhuman primates have whites of the eyes, at least not that can be easily seen.
因为黑猩猩，乃至其它220种非人灵长类动物都没有眼白，或者说至少没有明显的眼白。