patina

• 名词，指金属（如铜或青铜）表面因长期氧化而形成的薄层，通常呈绿色或棕色；也泛指因岁月流逝而在物体表面形成的具有美感的陈旧光泽或痕迹。

A noun referring to a thin layer or coating, typically a green or brown film, that forms on the surface of metals like copper or bronze due to oxidation over time.

1. Surface coating on metalB2formal

   A thin, greenish or brownish layer that forms on the surface of metals like copper or bronze due to oxidation over time.

   铜绿

   • The statue of liberty has a beautiful green patina.
   • The old copper pot developed a rich patina after years of use.
   • Collectors often value the natural patina on antique bronze sculptures.

   同义词coatingtarnishverdigris

2. Sign of age or maturityB2formal

   A surface appearance that develops over time, often considered attractive or valuable, indicating age or use.

   岁月痕迹或成熟的标志

   • The wooden table had a lovely patina from decades of polishing.
   • The leather chair acquired a warm patina with age.
   • The building's patina gave it a sense of history and character.