You see, over one billion years ago, the first primitive cells started to evolve on this planet.

你看， 十亿多年前，第一批原始细胞开始在这个星球上进化。

What's also fascinating is it's also thought that this may have been able to detect light, it may have had primitive cells that were sensitive to light, and allowed it in a very loose sense to see.

更神奇的是，人们还认为皮卡虫也许能感觉到光线，它身上可能有一些原始的感光细胞使它拥有了比较低级的视力。