principal

释义

n. 校长, 首长, 本金, 主犯, 资本, 委托人\na. 主要的, 最重要的, 首要的 principal component 主成分；[化]知组分 principal component analysis 主成分分析 principal and interest 本利，本金及利息

例句

His principal reason for making the journey was to visit his family.

他那次旅程的首要目的是探访家人。

Teaching is her principal source of income.

教书是她主要的收入来源。