原级：nullity
1. This article expoundes the method and course of ionization capacitor filtering test, by analyzing the mechanism or capacitor nullity, the author found out the basic reason of over-capacity, current leakage overfolw and other kinds of nullities.
阐述了电解电容器的老化筛选试验方案和试验过程，并对筛选失效的电容进行了初步的机理分析，找到了容量超差，漏电流超值及其它失效的基本原因。
nullities的解释
2. This paper gave a review of recent developments in the study of nullities of undirected simple graphs.
综述无向简单图零度问题近年来所取得的研究进展。
3. Nullities of bipartite graphs, cycle graphs, bicycle graphs, tree graphs, line graphs of trees, and graphs with large nullities were discussed.
具体介绍了二部图、树、单圈图、双圈图和树的线图等的零度刻划，还讨论了大零度图等问题。