一硝酸盐

The observation and monitoring were carried out for one year. Improvements resulted from the project include suspended particles, transparency, concentration of chlorophyll A, total organic carbon, total nitrogen. Factors that did not show obvious improvement include electrical conduction, concentration of nitrate nitrogen, ammonia nitrogen, nitrous nitrogen, phosphate salts. Finally, factors that were influenced by environment include water level, temperature, pH, total phosphorus, chloride salts.

历经一年的试验，因设备投入而改善之因子为溶氧、浊度、悬浮固体、透明度、叶绿素a、总有机碳、总氮等7项，无明显变化之项目为导电度、硝酸盐氮、氨氮、亚硝酸盐氮、磷酸盐等5项，受环境影响因子为水位、水温、pH、总磷、氯盐等5项。

As you've probably already guessed nitrates that are the breakdown product of nitrites are not good for fish either.

或许你们也已经猜到硝酸盐是分解亚硝酸盐后的产物，而且对鱼只而言也是一种不好的化学物质。

You'll need to use test kits at least once each season to make sure elements such as ammonia, nitrites and nitrates are in order.

您需要使用测试工具在每个赛季至少一次，以确保元素，如氨，亚硝酸盐和硝酸盐按顺序。

As they eat the nitrates, they form nitrites as an intermediate chemical byproduct.

当他们吸收这些硝酸盐的时候，会形成一种可以成为副产物的亚硝酸盐的中间产物。

You'll need to use test kits at least once each season to make sure elements such as ammonia, nitrites and nitrates are in order.

你需要把它用成套测试设备至少一次，每个季节，以确保分子如氨，亚硝酸盐及硝酸盐符合规定。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。