主成分 base●basis●chief constituent●chief ingredient●dominant component●key ingredient●main component●major component〔【略】MC〕●major constituent●major element●primary component●primary constituent●primary ingredient●principal component●principal constituent●principal element●principal ingredient

主成分として in major proportions

主成分として含む〔~を〕 contain ~ as a major ingredient

主成分とする〔~を〕 consist primarily of

主成分回帰 principal-component regression

主成分分析 principal component analysis [analyses]〔【略】PCA◆「分析・解析」の単数形＝analysis、複数形＝analyses〕●principle component analysis [analyses]〔「分析・解析」の単数形＝analysis、複数形＝analyses〕