基本解釋短半軸詞組短語短語angular semi -minor axis [天]角半短逕ratio of semi -minor axis length 長短軸之比minor semi -axis 短半軸;[數(shù)]短軸半逕semiminor axis更多詞組專業(yè)釋義數(shù)學(xué)半短軸半副軸