patina

2.薄层；（木器或皮革的）光泽a thin layer that forms on other materials; the shiny surface that develops on wood or leather when it is polished

1.(青铜器上的)绿锈,古翠;【艺】古色;(木器,墙壁等由年久而产生的)光泽面

2.(长久的经验[习惯]形成的)神情,外貌

3.(古罗马的)盘子;(盛圣餐面包的)金属盘

1.a green layer that forms naturally on some metals, especially copper, over a period of time

2.a shiny surface that develops on wood or leather over a period of time

3.a thin layer of something such as dirt that covers an object or a surface