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1·The toxicity of chromium in different valent are quite different.

不同价态的铬具有不同的毒性。

2·In the disappearing existence sentences, the verbs must be mono-valent ones.

隐现句中的动词只能是一价动词。

3·The results show that: both ultrasound and zero-valent iron can degrade P-nitrochlorobenzene.

结果表明，超声波和零价铁都可使对硝基氯苯得到降解。

4·The progress in linear chain clusters of low-valent platinum group metals is briefly reviewed.

本文就有关线性低价铂系金属簇合物的研究进展作一简述。

5·Our interest is to investigate reductive coupling reactions induced by low-valent titanium reagent.

这种试剂被广泛应用于分子内和分子间的还原偶联等反应。

6·The paper reports the reductive coupling of aromatic ketones to alkanes by low-valent titanium salt.

本文报导用低价钛盐还原偶联芳酮为烷烃的反应。

7·The mechanisms of chromium removal by zero valent iron and the effects of the anions were also depicted.

初步探讨了零价铁除铬和小分子阴离子对铬去除影响的机理。

8·Progress in pinacol coupling of aldehydes and ketones using low valent titanium is reviewed in recent years.

文章综述近几年来由低价钛还原偶联醛酮合成片呐醇的进展。

9·This is also the development direction of zero valent iron applied to wastewater treatment fields in the future.

故该领域需要更多学者的研究以使零价铁在污水处理领域发挥更大的作用。

10·As a new type of zero-valent iron, sponge iron possesses positive capacities for removing pollutants from water body.

作为一种新型的零价铁材料，海绵铁在处理水体污染物的过程中显示了较强的处理能力。