短語詞組短語nonzero winding number rule 非零環(huán)繞數(shù)規(guī)則nonzero o number 非零數(shù)nonzero algebraic number [數(shù)]非零代數(shù)數(shù)rule of nonzero winding number 非零環(huán)繞數(shù)規(guī)則 返回 nonzero number