要成为公民，申请人必须正式宣誓放弃对所有外国势力的效忠。
To become a citizen, the applicant must abjure all previous allegiances to foreign powers.
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解释
abjure 形容在法律归化程序中正式宣誓放弃原有效忠关系。
To become a citizen, the applicant must abjure all previous allegiances to foreign powers.
abjure 形容在法律归化程序中正式宣誓放弃原有效忠关系。