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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.
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更新时间:2025/9/2 9:05:53