网站首页 汉语 德语 英语
The circle whose centre is the radical centre of three given circles and which intersects each circle orthogonally.
Late 19th century; earliest use found in John Casey (1820–1891), mathematician. After French cercle radical.
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。