光的颜色取决于半导体的特性，可以对这些特性加以调试以发出与自然日光相近的灯光但却几乎不含紫外线或热量。
The colour depends on the properties of the semiconductor, and these can be tuned to produce light that is similar to natural daylight but with virtually no ultraviolet or heat.
电磁搅动对凝固特性的影响实质上是导致凝固过程动量、热量及质量传输变化的综合结果。
In nature, the effect of the electromagnetic stirring on the characteristics of solidification is the comprehensive result of the heat, mass and momentum transport during solidification.
从经济性和可靠性角度分析探讨了煤的发热量、灰分、水分等衡量煤质的特性指标对输煤系统的影响。
The influence of coal characteristic indices such as caloricity ash content and water content on the coal handling system is discussed in the aspects of economy and reliability.
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