硝酸

A second traditional method for removing organic matter that does not require heat is the use of a chromic acid–sulfuric acid mixture.

热硝酸是过去经常使用的一种非常有效的清洗玻璃器皿的方法，另一种传统的用于洗涤有机物而又不需加热的方法是使用铬酸-硫酸混合液，但考虑到其自身的危险性及毒性，我们不推荐使用铬酸。

Usual chromic and nitric acid bright dips for cadmium are not chromate treatments.

通常用三价铬和硝酸浸入抛光镉镀层而不是铬镀层。

But on the other hand, it cannot be used for concentrated nitric acid, chrome acid mixture, chloric solution, aliphatic solution and balmy hydrogen etc..

但不适用于浓缩硝酸、铬酸混合物、含氯溶剂、脂肪族、芳香氢等介质液体的测量。

The extraction mechanism is obtained and the separation of Zn and Cd is discussed.

揭示了Cyanex923萃取硝酸过程中出现第三相的机理和三相的相行为，讨论了第三相形成的影响因素。

Water column samples taken from the northern and the southern lake centers in Hongfeng lake in summer stratification were measured about their water temperature, pH, the concentration of HCO3(superscript -), DO, Chla, NH4(superscript +), NO3(superscript -)、and PO(superscript 3- subscript 4). The pressure of CO2 (pCO2) was calculated by the chemical balance and the Henry's law.

在夏季分层期间对红枫湖南、北湖湖心的水样进行分层采集，同时测定了分层水样的温度、pH、HCO3浓度、溶解氧、叶绿素a及铵根离子NH4(上标+、硝酸根离子NO3(上标-、磷酸根离子PO(上标 3-下标 4的浓度，水体中CO2的分压(pCO2)由化学平衡及亨利定律求得。

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。