principal (EN)

形容词，名词

形容词 “principal”

1. 主要的
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   The principal reason for his success is his dedication.

名词 “principal”

1. 校长
   The principal announced new policies during the school assembly.
2. 本金（借出或投资的原始金额，不包括利息）
   She is focused on paying off the principal of her mortgage.
3. 委托人 (法律上，授权代理人代表其行事的人)
   The principal granted his attorney the power to act on his behalf.
4. 主要演员或主演
   After years of hard work, she became a principal in the ballet company.