The water flowing out of the Villa Luz cave in Mexico 从墨西哥露兹别墅山洞流出来的水
The cave angel fish feed on bacteria in the fast flowing water 洞穴天使鱼以急流中的细菌为食
Receptors in their skin detect minute movements in the water made by its prey. 皮肤上的探测器能觉察到 猎物引起的最微小的水流变化
External gills help it to breathe in water that is particularly low in oxygen. 外生的鳃帮助它们 在极度缺氧的水中呼吸
After a day feeding in the open water 经过一天开放水域的觅食之后
Salt water, unlike fresh water, does not erode limestone, 咸水与淡水不同 不会溶解石灰岩
Fresh water from the jungle flows over the heavier salt water from the sea. 咸水来自海洋 比重较重 来自丛林的淡水在其上方流动
The Maya knew that their lives depended on this water, 玛雅人固然知道 它们的生活离不开这些水