“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	gold tin precipitate gold tin purple gold trioxide golfada golf ball Golgi apparatus Golgi cell Golgi-Mazzoni's corpuscle Golgi stack Golgi tendon organ Gomberg-Bachmann-Hey reaction Gomberg reaction Gompertz curve Gomphidae gomphosis Gomphotheriidae Gomphotheriinae gon gonad gonadal agenesis gonadal dysgenesis gonadectomy gonadotropic hormone gonadotropin gonapophysis

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