目的探讨建立食品污染物监测体系的必要性、现实意义和方法，并对建立体系的效果进行评估。

Objective the practical significance and methods to set up a food pollution surveillance and analysis system were studied and the effectiveness was evaluated.

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介绍了废气污染物监测方法，根据实践经验总结了等速采样法在烟尘测试过程中的准确分析路径。

The monitoring methods of detecting waste gas pollution are introduced. The accurate analysis path of detecting dust by isokinetic sampling method is concluded based on the practical experiments.

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这儿所显示的程序，他说，提供了监测污染物变化以及改善世界范围内模型的可能性。

The procedures demonstrated here, he said, offer the capability to detect emission changes and improve models the world over.

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