A snake's eyes aren't very good, but they can detect movement. 蛇的视力并不是很好 但它们可以感知到移动物体
and keen eyes have spotted movement. 军舰鸟锐利的眼睛正在搜寻
But lions have much more sensitive eyes. 而狮子有着更加锐利的视力
With so many pairs of eyes keeping watch, 有了这么多双警惕的眼睛
It takes thousands of generations for eyes to be lost, 眼睛的退化需要经历数千代的演变
Its eyes do not fully open until three months after birth, 直到出生后的第3个月 它的眼睛才能完全睁开