下层的用英语怎么说？

下层的

• lower

例句

• New fortunes were being made in trade almost daily by " nobodies " rising from below. 来自下层的 “ 无名之辈 ” 几乎每日都有人在商业中发财致富.
• Althouth very thin, the epidermis serves to protect the underlying dermis. 表皮虽然非常薄, 却可用来保护下层的真皮.
• I had already met Pete a couple of times through — how should I put it — friends in low places... 我已经见过皮特几次了，是通过——怎么说呢——一些社会下层的朋友见的。