There are few upwellings in the tropics, which are thus nutrient-poor.

热带地区很少有上升流，因此缺乏硝酸盐。

Because of that, you don't see any kind of nitrate formation in these tropical pastures.

因此，在这类热带牧草中不会出现任何硝酸盐。

Each molecule is made up of three nitrate groups bound to a chain of carbons.

每个分子由三个与碳链结合的硝酸盐基团组成。

On the other hand, nitrites help to prevent bacterial growth that can cause botulism.

另一方面，亚硝酸盐有助于防止细菌生长的特性可导致肉毒中毒。

Ship crews might dump more sulfur and nitrates into the ocean.

船员可能会向海洋中排放更多的硫和硝酸盐。

It can also pollute water with nitrates and create the pollutant nitrous oxide, he said.

他说，牛尿分解而成的硝酸盐会污染水，它也会转化成污染物——一氧化二氮。

Nutritionists now often consider nitrate levels when producing training plans for athletes and sports teams.

营养学家现在在为运动员和运动队制定训练计划时，通常会考虑硝酸盐水平。

It's consuming nearly 95 to 99 percent of the fertilizer nitrogen and splitting it out into nitrates.

它会消耗氮肥中 95% 至 99% 的氮，再以硝酸盐的形态将其排出。

Scientists blame rising sea temperatures a nitrate-rich pollution for fueling the algae growth that causes the slime.

科学家将海水温度上升归咎于富含硝酸盐的污染，因为它助长了藻类的生长，导致了污垢的产生。

The main suspect bad compounds put specifically in processed meat are nitrates and nitrites.

加工过的肉类中，主要被怀疑有害的化合物是硝酸盐和亚硝酸盐。

Therefore, it has been suggested that elite athletes might not benefit from nitrates supplementation.

因此，有人认为，优秀运动员可能不会从硝酸盐补充剂中受益。

Well, Nitrosamines are the cancerous compounds suspected to form from the nitrate and nitrites found in processed meat.

人们怀疑亚硝胺是由加工肉类中的硝酸盐和亚硝酸盐形成的癌症化合物。

So there is a much larger potential for nitrate supplementation to work.

所以补充硝酸盐可以给你提供很大的潜力。

Second, beets and beet juice are rich in nitrates, which can help widen your blood vessels and improve blood pressure.

第二，甜菜和甜菜汁都富含硝酸盐，可以帮助扩张血管和改善血压。

Now, there are some major issues with the nitrate nitrite idea.

现在，硝酸盐亚硝酸盐的观点有一些主要的问题。

These nitrites react with amino acids during cooking, forming nitrosamines, which are known carcinogens, increasing your risk of developing cancer.

这些亚硝酸盐在烹饪过程中与氨基酸发生反应，形成亚硝胺，亚硝胺是已知的致癌物质，会增加患癌症的风险。

For endurance athletes, elite athletes might not benefit from nitrate supplementation because they're so well-developed already.

对于耐力运动员来说，其精英运动员可能不会从补充硝酸盐中受益，因为他们已经发育得很好了。

Nitrates are abundant at the surface in both places, which is why they are among the world's richest fishing grounds.

这两个地区的海面都有丰富的硝酸盐，这也是为什么这两处是世界上最大渔场的原因。

Now what about the nitrate? Also anion.

那么硝酸盐呢？ 还有负离子。

Nitrates, sulfates and phosphates are really common and they're always anions.

硝酸盐、硫酸盐和磷酸盐很常见， 而且它们总是阴离子。