“signum”的概念、定义、翻译、参考文献-科学参考

单词	signum
释义	signum [`sig·nǝm] ^MATHEMATICS The real function sgn(x ) defined for all x different from zero, where sgn(x ) = 1 if x > 0 and sgn(x ) = -1 if x 0.
随便看	connection gas connective tissue connectivity number connector connector block connect time connellite connexon conning tower connivent Conoclypidae Conocyeminae conode conodont Conodontiformes Conodontophoridia conoid conoid of Sturm Conopidae conoplain conoscope conotheca Conrad discontinuity Conrad machine Conradson carbon test

科学参考收录了103327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。