“四元码”的概念、定义、翻译、参考文献-科学参考

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。

单词	四元码
释义	四元码 four-unit code
随便看	non-multiple switchboard nonmultiple switchboard non-natural non-navigable non-navigable dam non-navigable river non-NCP station nonnegative combination nonnegative condition non-negative definite nonnegative definite matrix nonnegative form nonnegative function nonnegative integer nonnegative integral form nonnegative matrix nonnegative number non-negative operator nonnegative quadrant nonnegative restriction nonnegative type nonnegative value non-negative variable nonnegativity condition nonnegativity constraint