酸性物质

降水酸化严重，所采样品的pH值全部小于5.6，最小pH值为3.71，平均pH值为4.26，降水中主要酸性物质是硫酸，而硝酸则占次要地位；

The precipitation was acidified seriously with pH values of all samples below 5 . 6 , the lowest pH value was 3.71 and the average was 4 . 26 . The major acidic material in precipitation was sulfate .

经过大量研究，艾伯特·霍夫曼于1938年首次成功合成了该酸性物质。

After extensive research , Albert Hoffman first succeeded in synthesizing the acid in 1938

清洁银器时要戴上棉手套，因为你皮肤里的酸性物质会使它失去光泽。

Wear cotton gloves when cleaning silver , because the acid in your skin can tarnish the metal .

去离子水在放电反应器中处理后pH下降，电导率上升，表示放电产生了大量导电离子和酸性物质。

PH and conductivity of distilled water are decreased after treatment by electric discharge .

微波使蒲公英、荠菜的总酸性物质、可溶性糖含量增加，维生素C、氨基态氮含量降低。

Microwave cooking increased the contents of acid , soluble sugar , decreased the contents of vitamin C , amino-N.

n.酸有些酸性物质能在布料或木头上烧成洞。

acid Some acids burn holes in cloth and wood .

另外烟气中一般会存在粉尘和酸性物质如SO2、NOX等。

In addition , the flue gas generally contains dust and acidic substances such as SO2 , NOX and so on .

由反应原理可知，原则上任何强酸性物质均可作为合成MTBE的催化剂。

According to the theory , in principle any strong acid substance can be used as MTBE catalyst .

庐山春季高山降水和云雾水均已严重酸化，所采样品的PH值全部小于5.6，主要酸性物质是硫酸，硝酸占次要地位；

The precipitation and cloud water in spring at the top of Lushan was acidified seriously , the pH value of all samples was below 5 . 6 , the major acid was sulfuric .

用pH值测定法控制炭药质量，通过测定山楂不同炮制工艺所得标准炭品的pH值和酸性物质含量，以及相关的药理实验，来验证改进工艺的可行性。

Taking Fructus crataegi as an example , the capability of improving procedure can be proved by determining pH value and the content of acid substance in the standard carbonic herbs treated by different processing procedure and doing pharmacological experiments .

急性肺损伤（ALI）是一种相对比较常见的能危及生命的疾病。它可以由脓血症、创伤和吸入酸性物质引起，后者是全身麻醉的并发症之一。

Acute lung injury ( ALI ) is a relatively common life-threatening condition that can be caused by sepsis , trauma , and acid aspiration , which can be a complication of general anesthesia .

清洁剂的另外一个功效，是提供碱性（或者TBN），以中和燃烧生成的酸性物质

The detergents have a secondary role in providing ′ base ′ ( or TBN ) to neutralise combustions acids

采用全二维气相色谱/飞行时间质谱（GC×GCTOFMS）法和GCTOFMS定性分析了烟草中挥发性、半挥发性酸性物质。

The volatile and semi-volatile acidic components in tobacco were analyzed qualitatively by ( comprehensive ) two-dimensional gas chromatography / time-of-flight mass spectrometry ( GC × GC / TOFMS ) and GC / TOFMS .

同时通过研究多种酸性物质，确定盐酸作为稳定二氧化氯溶液的理想活化剂，活化时间为30min，活化率可达85%。

Through researching some kinds of acid matter , HCL is a ideal activator to stable chloride dioxide . The time of activation is 30 min ; activating rate is at 85 % .

这些纸似乎没有加酸性物质。

Doesn 't seem to be anything here about acid content .

聚氯乙烯-吡啶树脂对酸性物质的吸附性研究

A Study of the Adsorption of PVC-pyridine Resin for Acid Substances

花生酸奶后发酵中酸性物质的研究

The research on acidic substance of peanut yoghurt during post fermentation

郑州市大气酸性物质与降水酸性的相关性分析

The Correlation Between Acid Material in Atmosphere and Precipitation Acidity

酸性物质对石灰性土壤磷的活化效应

Effect of Acid Materials on Phosphate Activation in Calcareous Soil

这些酸性物质会腐蚀你的牙齿。

The acid is what eats away at your teeth .

他们解释说人吃过东西后，牙齿会受到酸性物质的攻击。

The say that after eating , acid attacks one 's teeth .

酸性物质摄入引起的儿童胃幽门阻塞

Gastric outlet obstruction secondary to acid ingestion in children

这一过程将产生一种损害牙齿的酸性物质。

This action creates acid that damages the tooth .

雨水中的酸性物质慢慢侵蚀着石墙。

The acid in the rain slowly ate away at the stone wall .

番茄汁里的酸性物质会降解酒中的其他成分。

The acids in tomato juice can degrade the drink 's other ingredients .

这样可以中和其中的酸性物质，以免造成难闻的气味。

This will neutralize acids which may form and cause a bad smell .

5.用漱口水漱口，清洗掉任何残余的酸性物质。

Step 5 Rinse your mouth with mouthwash to wash away residual acid .

母乳可以减缓口腔中细菌的滋长和酸性物质的生成。

Breast milk can help bacterial growth and acid production in the mouth .

咖啡不仅加快你排汗的速度，它也是极酸的酸性物质。

Coffee not only accelerates your rate of perspiration it 's also extremely acidic .

酸洗过的工件应立即用水冲洗，特别是如果酸性物质是热的时候。

Pickled work should be rinsed promptly , particularly if the acid is hot .