迁徙可以调节动物的局部密度。

Migration can regulate the local density of animals.

调节新陈代谢和器官功能的荷尔蒙。

A hormone which regulates metabolism and organ function.

水能调节动物的体温。

Water can regulate the body temperature of animals.

沼泽是调节水流的海绵。

Marshes are sponges that regulate the flow of water.

它也有助于调节细胞间的交流。

It also helps regulate communication between cells.