Z-order is an ordering of overlapping two-dimensional objects, such as windows in a graphical user interface (GUI), shapes in a vector graphics editor, or objects in a 3D application.Foley, James, Andries van Dam, Steven Feiner, and John Hughes.
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。