jus sanguinis

Most European nations apply jus sanguinis, granting citizenship based on parental nationality.大多数欧洲国家实行血统原则，根据父母的国籍授予国籍。

Under jus sanguinis, children born abroad to national parents retain citizenship rights.根据血统原则，在国外出生且父母拥有本国国籍的儿童保留公民权。