These light-deprived plants die off and decompose in a process which uses up the water's already depleted oxygen supply.

这些被剥夺阳光的植物会死亡，接著分解，这个过程会用掉水中已经快耗尽的氧气供应。

Smoking can alter the oral microbiota by increasing the acidity of saliva, depleting oxygen, influencing oral baterial adherence to mucosal surfaces, and impairing host immunity.

吸烟能通过增加唾液酸度、消耗氧气含量、影响口腔细菌对黏膜表面的附着、降低宿主免疫力等方式，改变口腔微生物群。

Opponents have voiced their concerns about  Mose's impact on the lagoon's ecological systems, as holding back water in this way could lead to  depleted oxygen levels.

反对者表达了他们对摩西对泻湖生态系统影响的担忧，因为以这种方式阻止水可能会导致氧气含量耗尽。

The algae bloom depletes the oxygen from the water, in turn killing the fish and has also killed more than half of the lagoon sea grass.

藻类大量繁殖耗尽了水中的氧气， 进而杀死了鱼类， 还杀死了一半以上的泻湖海草。