“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	bora fog Boraginaceae Boralf borane borate borate mineral borax borax glass borazole borazon Borda mouthpiece Bordeaux mixture bordered bordered pit border facies bordering borderland borderland slope borderline mental retardation borderline psychosis borderline syndrome border-punched card Bordetella Bordini effect bore

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