The background of X ray Photoelectron spectroscopy (XPS) spectrum, which was often neglected in the past, may provide valuable information on surface morphology and depth profile.
光电子谱中的背景信号包含样品的信息，但过去往往被忽略。
The common background method dealing with the background of diffraction profile was presented to increase the efficiency of X-ray stress measurement.
为了提高X射线应力分析的效率，提出了公用背底法对衍射线进行背底扣除。
The recent researches of cosmic X-ray background radiation are introduced in this paper.
本文介绍了宇宙X射线背景的研究近况。
BACKGROUND: Isthemic and degenerative lumbar spondylolisthesis exhibit different images. CT can display morphological changes of facet joint, which is superior over X-ray films.
背景：真性、假性腰椎滑脱时的影像学表现有许多不同之处，CT能显示小关节的形态学变化，具有普通X射线平片没有的优势。
BACKGROUND: Isthemic and degenerative lumbar spondylolisthesis exhibit different images. CT can display morphological changes of facet joint, which is superior over X-ray films.
背景：真性、假性腰椎滑脱时的影像学表现有许多不同之处，CT能显示小关节的形态学变化，具有普通X射线平片没有的优势。
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