这小生物眼睛还看不见，一出生就本能地爬进育婴袋里。
After birth, the tiny blind creature claws its way instinctively towards the brood pouch.
科学家通过调查了17个不同种类的鲨鱼后发现这种生物眼睛内只具有一种感色细胞，称为“视锥细胞”。
The scientists, who examined retinas of 17 different species of shark, discovered that the creatures had only one type of colour-sensitive cell, known as a cone cell, in their eyes.
我们是白天活动的生物，眼睛已经适应了在阳光下的生活。
We are diurnal creatures, with eyes adapted to living in the sun's light.
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