酸性

Other natural acid-forming gases dissolve in the water.

参考译文：即使在未受污染的空气里面，雨还是轻微偏酸性的，因为空气中的二氧化碳和其他天然的酸性气体溶解在了水里。

With use of acid-forming ammonium fertilizers, this tends to cause a shallow, acid layer at the soil surface after some years.

随着生理酸性铵态氮的使用，数年后便可能在土表形成一酸性薄层。

Among the analysis methods, back-titration with Ca 〓 was adopted other than direct-titration or back-titration with NaOH. Because Ca 〓 method is carried out in acidic condition, in which the hydrolysis of ester-linkages could be neglected.

该法的分析测定是在酸性条件下进行的，多羧酸纤维素酯在酸性条件下基本不水解，可以忽略酯键存在对测定结果的影响。

The SERS of various concentration of Reactive Red, Acid Red, Acid Black, Direct sol orange and Calcon Carboxylic Acid adsorbed on silver colloid are studied by micro-Raman spectrometer. It has been found that the SERS intensity of absorbed molecules is mainly from the nearest molecule layer to the surface of silver colloid. That is, SERS has its single layer saturation effect. 2. The technique of direct deposition of silver colloid on a Kaolinite surface is first described.

以银溶胶作基底，利用显微拉曼光谱仪对不同浓度的活性艳红、酸性红、酸性黑、直接耐晒橙四种染料和钙羧酸指示剂的表面增强拉曼光谱进行了研究，结果表明，由于表面增强拉曼散射具有单分子层饱和效应和银溶胶系统对荧光的猝灭率很高，能吸附染料分子并增强拉曼散射的强度，且吸附分子的表面增强拉曼散射的强度，主要是由于最靠近银溶胶的一层分子的增强，而第一层以外的分子贡献很小。

The SERS of Reactive Red, Acid Red, Acid Black, Direct sol orange, chlorsulfuron, atrazine and carboxin adsorbed on Kaolinte then covered with silver colloid are studied by micro-Raman spectrometer.

首次尝试了在无SERS活性的高岭土上沉积银溶胶的方法，利用显微拉曼光谱仪研究了活性艳红、酸性红、酸性黑、直接耐晒橙四种染料和莠去津、萎锈灵、绿黄隆三种农药在高岭土上的表面增强拉曼光谱。

The diversity of microbial community in acid mine drainage is at low level and samples with similar biogeochemical properties have similar microbial communities.

在古矿井区域酸性矿坑水中微生物群落的多样性很低，生物地球化学特性相近的酸性矿坑水由具有相近的微生物群落组成。

This paper investigates the catalysis of D-72 strong acid cation exchange resin on the synthesis of acetals,and systematically discusses the influence of reaction factors on the catalysis reaction.

研究了强酸性阳离子交换树脂对缩醛合成反应的催化作用，系统地探讨了各反应因素对反应的影响，研究发现，D-72强酸性阳离子交换树脂具有较高的催化活性，并能重复使用。

Yet there are some life forms, like the red algae "Cyanidium caldarium", that have adapted to survive, and even thrive, in the most acidic of conditions, such as the hot volcano pools found in Yellowstone National Park.

然而某些生命形式如&淡水单细胞红藻&就能在强酸性环境（如：黄石国家公园的酸性热泉）中生存并且迅速繁殖。

The authors think that the magmas of the intermediate-acid volcanic rocks were derived from basaltic magmas of the lower crust and are mixed magmas produced by the increase of geothermal gradients due to diapiric injection of basaltic magmas and partial melting of intermediate-basic metamorphic igneous rocks in the lower crust,and that they resulted from a series of tectonomagmatic activities that took place when the closing of the Mongolian-Okhotsk sea trough and continent-continent collision caused crustal thickening and brought about the formation of the Hinggan-Mongolian orogenic belt in the process of oblique subduction of the Paleo-Pacific plate beneath the Siberian plate.

中文摘要：通过对大兴安岭北段晚侏罗世吉祥峰组中酸性火山岩的岩石地球化学研究，发现其中存在高Sr低Y型火山岩，即文献上所称的埃达克质岩，笔者认为中酸性火山岩的岩浆起源于下地壳玄武质岩浆，为玄武质岩浆底辟上侵引起地热梯度增加、下地壳中基性变质火成岩石部分熔融的之混合岩浆，是古太平洋板块向西伯利亚板块斜向俯冲过程中，蒙古鄂霍次克海槽封闭，陆壳碰撞使地壳加厚，形成兴蒙造山带时所引起的一系列构造岩浆活动。

The extracts of water and alcohol were separated by ion exchange resin. The eluates of neutral solution were the most effective against hydroxyl radicals and the highest rate of inhibiting hydroxyl radicals was 81%. The eluates of basic solution were also effective, the inhibit rate of which was 60%.

将发酵灵芝粉的水和醇提取物上离子交换树脂柱，依次用酸性、中性、碱性淋洗液洗脱分组，发现中性洗脱部分对羟基自由基抑制作用最强，抑制率最高可达81％；碱性洗脱部分亦具有抑制羟基自由基的效果；酸性洗脱部分抑制羟基自由基的作用不强，且占很少比例。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。