She bought a pair of black ballerinas to match her work outfits.

ballerinas 是名词 ballet（芭蕾）的衍生词，原指"芭蕾舞演员"。在时尚领域，ballerinas 指一种类似芭蕾舞鞋的平底女鞋，特点是圆头、无鞋带、平跟，通常采用柔软材质制成。