短語詞組用作形容詞 (adj.)～+名詞principal food 主要食物principal interest 本利principal offender 主犯principal sum 本金用作名詞 (n.)動詞+～consult the principal 與委托人商量pay off the principal and interest 付清本息名詞+～school principal 校長介詞+～as a principal 作爲(wèi)主犯～+介詞principal in the first degree 主犯the principal of college 學(xué)院院長短語 返回 principial