海的层次, 人的层次

海的层次:
1. 阳光区: 海面---150米深
   光线透过水的折射分散在蔚兰的海水中, 阳光灿烂.
  sunlight supports many forms of plants life. both big and small . This is where most marine plants, fish,and other sea creatures live. ------舒服,美丽世界

2.the twilight zone--(150m--1000m) the water here is very dark blue, sunlight fades.It is too dark and too cold here for plants to grow.There are some twinkling lights that are made by the amazing sea creatures. They are bioluminescent. 鱼儿自己发光,寻找或引诱猎物. ------有点累

3.The dark zone(1000m--3900m) Some of the creatures moving about look weird and scary.Some are hunters.Others are scavengers,eating what floats down from above.Food is scarce, Many of the fish have huge jaws and expandable stomachs and often eat prey as big as they are. -------饥饿,丑陋
 
4.deeper......

 想想, 人的生活层是否有点相似?