The organic matter may partially decompose, using up the dissolved oxygen in the sediment.

有机物会局部分解，消耗沉淀里的溶解氧。

Unable to wash downriver, the nutrients build up while dissolved oxygen in the water decreases.

养分因无法向下游流动而不断累积，同时水中的溶解氧量却不断减少。

One more detail bears mentioning: that is the warmer water also holds less dissolved oxygen.

水温升高会导致水中的溶解氧含量减少。

Fey said an important finding was that the researchers were able to show such a notable drop in dissolved oxygen levels.

费伊称，研究人员能够证实溶解氧水平的显著下降非常重要。

Sometimes, for example, dissolved oxygen levels below dams get so low in summer that there is a negative impact on aquatic life.

例如，有时大坝下面的溶解氧水平夏季变得非常低，这对水生生物有负面影响。

The dissolved oxygen can then diffuse into the tissues, where it's needed to make ATP.

溶解氧可以扩散到组织中，组织中生成ATP。

In recent decades, the levels of dissolved oxygen in many watery environments, like rivers and oceans, has declined.

近几十里， 许多水生环境中的溶解氧水平，如河流和海洋， 已经下降。

They found that between 2003 and 2023, 83% showed a drop in the amount of dissolved oxygen.

他们发，2003至2023间，83%的湖泊溶解氧含量出下降。

Underwater, fish breathe with gills, which are feathery organs packed with blood vessels that absorb dissolved oxygen from the water.

水下，鱼用鳃呼吸，鳃是羽毛状的器官，里面布满了吸收水中溶解氧的血管。

In this lesson, we're going to discuss the significance of both hemoglobin and dissolved oxygen in terms of oxygen transport.

这节课中，我们将讨论血红蛋白和溶解氧氧传输方面的重要性。

You see, the dissolved oxygen diffuses into the plasma first, and then it diffuses into the red blood cells.

你看，溶解氧首先扩散到血浆，然后扩散到红细胞。

And that cold water allows it to hold onto lots of dissolved oxygen, which might help animals to get bigger and age slower than they would elsewhere.

而这种冷水使其能够保持大量的溶解氧，这可能有助于动物变得更大，寿命更长。

Therefore, while the amount of dissolved oxygen may be low compared to the amount bound to hemoglobin, dissolved oxygen is essential for oxygen transport.

因此，虽然溶解氧的量可能比与血红蛋白结合的量低，但溶解氧对于氧的运输是必不可少的。

However, even the primary source of oxygen that fish get is not from the oxygen in H2O, but from microscopic bubbles of dissolved oxygen in the water.

然而，即使鱼获得氧气的主要来源也不是来自 H2O 中的氧气，而是来自水中溶解氧的微小气泡。

Now, by using a machine learning model, along with existing measurements of lake oxygen, a team of researchers have been able to assess the changes in more than 15,000 lakes worldwide.

如今， 通过使用机器习模型，并结合有的湖泊溶解氧测量数据，一组研究人员能够评估全球超过15000个湖泊的变化。