虚根[xū gēn]
词典danci.911cha.com
词典imaginary root：虚根。
imaginary root
1. imaginary root：imaginary number 虚数 | imaginary root 虚根 | implication 蕴涵式;蕴含式
2. real root vectors：物权化:real right | 虚根:real root vectors | 真科学:real science