单词	字音不調
释义	同Cacophony
随便看	principal component factor analysis principal component regression method principal component regression spectrophotometry principal components principal components analysis principal components regression principal component transformation principal composition series principal congruence principal congruence subgroup principal contour principal controller principal coordinate principal coordinate plane principal coordinates principal coordinates analysis principal crop principal crossed homomorphism principal cubic root principal current principal curvature principal curvatures principal curve principal cyst principal cyst-- mother cyst-- parent cyst