Remarkably, the ion tail easily stretches past background star cluster NGC 1245 (upper left) in the constellation Perseus, about 1.5 degrees from the comet's lovely greenish head or coma.
明显地，离子彗尾轻易伸展至背景星团NGC 1245（上左）的前面，在飞马座，离彗星可爱的绿色彗头或彗发1.5度。
The technical background and principle of Ion Mobility Spectrometry technique is introduced in the paper.
介绍动态离子分析技术的技术背景和原理。
Layered manganese lithium ion battery cathode material is in line with this background needs.
层状锰系锂离子电池正极材料正符合此背景需要。
应用推荐