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This dissertation divides into seven chapters and the main contents and conclusions are listed as following:1. Three series binuclear lanthanide carboxylate coordination polymers 1～7 have been synthesized under hydrothermal conditions by altering the length of carbon chains between carboxyl group and phenyl ring on ligands, which are isophthalic acid, 1,3-phenylenediacetic acid and 1,3-phenoxydiacetic acid, and lanthanide ions such as Pr~(3+), Eu~(3+)and Ho~(3+).

论文共分七章，主要研究内容和结论如下：1、通过改变间苯二甲酸配体的羧基和苯环之间的碳链长度，从间苯二甲酸、间苯二乙酸到间苯二氧乙酸，以及改变稀土离子半径Pr~(3+、Eu~(3+)和Ho~(3+)出发，在水热条件下制备了三个系列双核金属单元的稀土羧酸二维配位聚合物1～7。

An investigation is made of the catalyzing behavior of silver ions in bacterial leaching of chalcopyrite.

对银离子催化细菌浸出黄铜矿进行了研究。

The aim was to study the change law of the negative air ions around the fountain.

［目的］研究喷泉周围空气负离子的变化规律。

They can chelate with metal ions and then its can be determination by some analytical methods.

它与金属离子有很强的络合作用，分析化学中常用来作为金属离子的络合剂，然后用一定的分析方法来测定金属离子。

It is non-oxidizing, provides the necessary solubility, will not chelate metal ions, and has relatively low toxicity.

它不仅溶解度好，而且还是非氧化性的物质，不会螯合金属离子，毒性也相对较低。

Chelation ion chromatography is suitable for the determination of trace metal ions in complex matrices.

螯合离子色谱可以对复杂基体中的痕量金属离子进行测定。

The research indicated that the variation of rain acidity,acid rain frequency and the equivalent concentration ratio of the chief anion ions to positive ones all presented conspicuous ascending trend,the chemical component of the rain was primarily influenced by the acidic gas and marine...

研究表明，深圳市降水酸性、酸雨频率以及酸碱离子当量浓度比值都呈显著的上升趋势，降水的化学成分主要受到社会经济活动产生的酸性气体以及海盐成分的影响，深圳及珠三角地区二氧化硫和氮氧化物排放量的增加是酸雨日益严重的重要原因。

Affected by heavy metal ions, the number of mitochondria and chloroplast reduced on different levels.

5受重金属离子的影响，线粒体和叶绿体的数目在不同程度上减少。

This study has hypothesized that high concentration of nitrate, acetic and chorine ions in the scrubbing water lowers the water vapor pressure which in turn reduces the relative humidity of the scrubber outlet from 90~100% to below 80%. As a result, nitric acid can't absorb water to grow into visible white smoke particles.

本研究推论白烟消失的原因是因为含有高浓度硝酸根离子、醋酸根离子及氯离子之洗涤水蒸气压变低，使得洗涤塔出口的相对湿度由90~100%降低至80%以下，因而使得硝酸无法反应及成长成可见之白烟微粒。

With a high refractive index and low chromatic dispersion, the rare earth ions mixed borate glasses have been widely used in many fields.

稀土玻璃由于具有高折射、低色散的特点，在红外光学玻璃以及有色光学玻璃等领域有着特殊的应用。

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。