“出身显贵”可以翻译为“be born into a noble or distinguished family” 或者 “come from an aristocratic/privileged background”。
“be born into a noble or distinguished family” 直接表达了出生于一个高贵或显赫的家庭这一含义。
“come from an aristocratic/privileged background” 侧重于强调来自一个有贵族特权或优越背景的家庭环境 。