This paper brings forward the indoor VOCs concentration control means, such as source controlling, ventilation and indoor air purifying based on the trait of VOCs emitting and distributing.
针对影响污染物散发及分布特点，给出了室内挥发性有机化合物的具体控制方法，如源头控制、通风及室内空气净化等。
According to the technological trait of pulse MAG welding, the pulse welding power source has been requested to have better dynamic character, biggish output power and upper reliability.
根据脉冲mag焊工艺特点，脉冲焊电源必须具有良好的动态特性、较大功率输出以及较高的可靠性。
The article expounds the essence, trait and the source of Simone Weil s concept of Evil as well as the ways to prevent away from it simply by taking the patriotism for example.
本文阐述了西蒙娜·薇依对“恶”的概念的思考，并按照薇依的指引，对恶的本质、特征、根源及克服恶的途径进行了提示。
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