长期存在的

To restore the ability of chromium can be dissolved in sulfuric acid, hydrochloric acid and High-FE acid and release hydrogen, but also of pure chromium with aqua regia does not work, when there is the presence of halogen ions in the acid can not be long-term stability, high temperature with alkali, hydrogen sulfide, sulfur steam, phosphorus, ammonia, such as carbon monoxide and water vapor reaction of the corresponding compounds, in the high temperature reaction of silicon into the silicide also chromium, chromium alloys with many metals generate a wide range of industrial applications, such as chromium-manganese stainless steel is used extensively for chemical plants.

铬的还原能力强，能溶于硫酸、盐酸和高FE氯酸而放出氢气，但纯铬连王水也不起作用，当有卤素离子存在时，在酸中不能长期稳定，高温时能与强碱、硫化氢、硫蒸汽、磷、氨、一氧化碳和水蒸汽等反应生成对应的化合物，在高温下还能与硅反应成硅化铬，铬能与许多金属生成合金广泛在工业上应用，如铬锰不锈钢大量用于化工设备。

In the process of the national long-term formation, existence and development, identity is the cohesive affinity.

在民族形成与发展的长期过程中，认同是民族形成、存在与发展的凝聚力。

However, he added,"I'd say the long-term risk is very small and may not be there, because it's certainly within the range of controlled confounding."

他说，"长期风险是很小的，可能不存在，它应在可控制的混杂因素范围内。"

PubMed abstract: We provide evidence here of long-term synaptic plasticity in a songbird forebrain area required for song learning, the lateral magnocellular nucleus of the anterior neostriatum.

PubMed摘要：我们在此提出证据，证实鸣鸟前脑区——前新纹状体的侧巨细胞核在学习鸣叫中，存在长期突触可塑性。

It is also generally the most persistent and difficult to manage.

它可以长期繁殖存在，而且很难灭除的。

There have the long run nonlinear cointegration link between the stock return rate and the inflation rate in China.

2我国微观股票市场中股票收益率与通货膨胀率之间存在长期的非线性协整关系。

The researchers found that sixty-two percent of the cancer survivors had at least one long-term health problem.

研究者发现62%的癌症幸存者至少存在一种长期健康问题。

But at the same time , we should not fail to see that some deepseated problems that have long been plaguing world food security are still unbridled hunger and poverty remain epidemic in many developing countries.

同时，也不得不看到，一些长期困扰世界粮食安全的深层次问题依然存在，饥饿和贫困依然在许多发展中国家肆虐。

However, a great deal of empirical research reveals that deviations between the fundamental value and NAV exist in financial markets.

但是，国内外的实证研究表明，封闭式基金存在着长期折价交易现象，这令标准金融理论感到困惑。

However, a great deal of empirical research reveals that deviations between the fundamental value and NAV exist in financial markets.

但是，国外的实证研究表明，封闭式基金存在着长期折价交易现象，这令标准金融理论感到困惑。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。