This habitable area is known as the photic zone.

片适宜居住的称为透光。

In its current state, only certain parts of the oceans are considered to be in the photic zone.

在目前情况下，在海洋中，只有特定的些区域是透光。

But if the oceans were to be completely transparent, theoretically, every part of the sea would be a photic zone.

但如果海洋是完全透明的，那么就理论上而言，海洋的每分就都会是透光。

The photic zone, which is bathed in sunlight during the day, and starlight and moonlight at night, reaches down a few hundred metres.

透光白天沐浴在阳光之中，夜晚沐浴星光和月光，透光低达几百米。

The " photic zone" is the layer of water near the ocean's surface where light can penetrate and plant life can grow.

透光是靠近海洋表面的水，在中光线可以穿透，植物生命可以生长。

The so-called photic sneeze reflex, AKA the Autosomal Cholinergic Helio-Ophthalmic Outburst, abbreviated" ACHOO" … yes, seriously… is experienced by about 1 in 4 people, leading scientists to believe it is genetically heritable.

所谓的“强光喷嚏反射”，又称常染色体胆碱能性赫里奥眼突出症，简称“Achoo”… 是的，讲真… 大约有四分之的人经历过，使得科学家相认为它是会遗传的。

Well, so there's a feedback loop here, and it goes back to whales feeding and then pooping in the upper layers of the water column right in the photic zone.

好吧， 里有个反馈循环，它回到了鲸鱼在水柱的上， 也就是透光进食和排泄的过程。