“出身低微者”可以翻译为 "those of humble/lowly origins" 或 "people from humble/lowly backgrounds"。
"humble/lowly origins" 强调出身的平凡或卑微。
"humble/lowly backgrounds" 则侧重于成长环境或家庭背景的普通。
这两个表达都适用于描述那些来自社会底层或家庭背景不显赫的人。