数环和数域
http://www.lztc.edu.cn/jpkc/2004/gddsx/%BD%CC%D1%A7%C4%DA%C8%DD%D7%D3%C4%BF%C2%BC/%C4%DA%C8%DD%D5%C21/1.4/1.4aa.htm
数环与数域有什么区别?
数环和数域
http://www.lztc.edu.cn/jpkc/2004/gddsx/%BD%CC%D1%A7%C4%DA%C8%DD%D7%D3%C4%BF%C2%BC/%C4%DA%C8%DD%D5%C21/1.4/1.4aa.htm