The model became famous overnight after being featured as one of the magazine's centerfolds.

centerfolds 是复合名词，由 center（中心）和 fold（折叠）组成。fold 在这里指杂志中可以展开的页面。centerfold 指杂志中间可以展开的双页，通常刊登大幅照片或重要内容。centerfolds 是 centerfold 的复数形式，特指杂志中间的插页。