基本解釋[數(shù)學]變形收縮形變收縮核詞組短語短語neighborhood deformation retract 鄰域形變收縮strong deformation retract 強形變收縮核weak deformation retract 弱變形收縮核deformation retract更多詞組專業(yè)釋義數(shù)學變形收縮形變收縮核