The effects of pollutants on materials, especially building materials, may be another area of concern and one which is often very visible and displeasing (for example, the defacing of ancient statues by sulfur dioxide in the atmosphere).
污染物对于原料的影响，特别是建筑材料，在某一区域是显然可见的，让人不愉快。（比如，大气中二氧化硫对古建筑的损害）
A further area of environmental impact involves esthetic depreciation such as reduces visibility, dirty skies, and unpleasant odors.
未来环境影响分析的领域将降低，比如能见度的下降、天空的污染和难闻的气味。
Finally, it is important to recognize that an environmental impact may not always be discernible by normal human perception so that detection may require sophisticated chemical or physical analysis.
最后，重要的是认识到以人类正常的知觉可能难以辨别出环境之间的冲突，以致发现需要高精度的化学或者物理分析。
In order to provide a meaningful description of the general field of environmental analysis, this field may be considered from three point pf view: the basic concepts underlying the reasons for and choice of the analysis which are normally performed; the available techniques and methodology commonly used; and the current status of capabilities in environmental analysis.
为了提供环境分析的一般领域的一个意味深长的描述,这个领域也许从三个观点考虑： 强调分析的选择的原因为选择执行通常的基本概念 ; 常用的有价值的技术和方法 ; 和在当前状态下的环境分析能力。
Some of the philosophical concepts which form the bases for environmental analyses are as follow.
一些来自环境分析基础的哲学概念如下的哲学概念如下：
Purpose目的
Collection and analysis of an environmental sample may be undertaken for the purpose of research or monitoring, or as a spot check.
为了研究或监测，一个环境样品的收集和分析可能被快速进行。
A spot check analysis is used to obtain rapid information about the approximate extent or nature of an environmental problem.快速监测分析常被用于获得一个环境问题的大概范围和性质的信息。
Authenticity真实性
Whatever the information being sought, it is vitally important to obtain an authentic sample which represents the particular system being investigated.
无论什么被寻找的信息，得到代表被调查的特殊系统的一个可靠样品是极为重要。
In fact, the ability to obtain an authentic sample is probably one of the most difficult aspects of any environmental analysis due to the considerable complexity and heterogeneity of most environmental systems.
实际上，由于多数环境系统可观的复杂和非均匀性，获得一个可靠样品大概是所有环境分析最困难的方面之一。
Detection limits察觉限制
A statement of the detection limits which can be attained by the analytical method being employed must always be included in providing the results of any environmental analysis. This is because considerable confusion exists about the meaning of a “zero” level of concentration. In fact, it is probably never possible to state that none of the atoms or molecules of the species in question are present so that no true zero exists.察觉限制的一种陈述是被使用的分析方式所尝试制，必须总是被包含在提供所有环境分析结果里面。这是因为关于“0”浓度的含义存在相当大的混乱。事实上，这也许是不可能实现的：物种里面没有原子或分子，所以没有真正的“0”浓度存在。
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