翻译:σ离散族 同义词1)σ-discrete family,sigma-discrete family,σ离散族2)σ-discretely collection,σ-离散族3)σ-discretely,σ-离散4)σ-fuzzy discrete,σ-模糊离散5)σ-discrete expandability,σ-离散可膨胀6)σ-closed discrete spaces,σ闭离散空间