本文对食用化学合成色素和天然色素的特性、使用注意事项及发展趋势作了全面阐述。
The character, notice items and develop trend of artificial color and natural color were be introduced.
本文介绍了国内人造草坪的发展趋势，选择人造草坪的方法和有关人造草坪建设的注意事项。
The article introduces the development trend of domestic man-made lawn, selecting method and notice concerned man-made lawn building.
本文通过工程实际阐述LED光源特点、发展趋势以及LED在照明工程中的应用和LED照明产品在工程安装中应注意的事项。
From practice of engineering, LED characteristic of light source, its development trend and using LED in lighting engineering are introduced, and fixing attention are also discussed.
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