The effect of O 2 flow rate on the background emission and some atomic and ionic lines in the new source is exploited in this paper.
本文主要探讨了屏蔽气氧气流量变化时对该新光源背景发射光谱及某些元素的原子线、离子线发射的影响。
The red glow in the background results from IC 1396, a large emission nebula that houses the Elephant's Trunk Nebula.
背景的红色光芒来自于 IC 1396，这是一个大型发射星云，其中居住着象躯星云。
The conception, application background, basic work principle of sound emission technology are introduced.
介绍了声发射技术的概念、应用背景及基本工作原理。
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