短語(yǔ)詞組短語(yǔ)torsion free group 非撓群torsion free commutative group 無(wú)扭交換群torsion -free abelian group 無(wú)扭阿貝爾群one -dimensional torsion group [數(shù)]一維撓群group without torsion 非撓群torsion radical of an l -group l群的撓根 返回 torsion group