(1)双重国籍
指一个人同时具有两个国家的公民身份。

(2)
〈美〉双重公民身份
指出生于美国或归化于美国的人，既是美国的公民，又是其所居住的州的公民，因而拥有双重公民身份。

• building code
• building contract
• building is covered
• building lease
• building lien
• building line
• building loan agreement
• building loan mortgage
• building material
• building permit
• building regulation
• building restriction
• building scheme
• building site
• building society
• building standard
• building-type restriction
• bul
• bulk
• bulk mortgage
• bulk sale
• Bulk Sales Acts
• bulk transfer
• bulky property
• bull