terrestrial animals

基本解釋

The gills of fishes are said to be analogous to the lungs in terrestrial animals.
魚類的鰓與陸上動物的肺可說成是類似的。
The sando's muted color palette was inspired by the typical hues of large terrestrial animals, like elephants and whales.
桑多水怪的暗色調(diào)霛感來源於象、鯨等大型地球動物的典型色調(diào)。
starwarsfans.cn
Why? Because fish can afford to be lazier than terrestrial animals. Fish essentially float all the time. So their muscles don't work constantly to fight gravity.
爲什麼呢？因爲魚類的生活比陸地動物“更慵嬾”。魚類一直都浮在水中，所以它們的肌肉不用長期對抗重力作用。