网站首页 汉语 德语 英语
A plane in which the changing state of a system over time may be plotted with reference to two variables; a two-dimensional phase space.
1940s.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。