casing
🇺🇸
/ˈkeɪsɪŋ/
🇬🇧
/ˈkeɪsɪŋ/
The outer covering or shell of something, like a protective layer.
The casing of the old building was damaged, so they decided to replace it.
这座老建筑的外墙受损了,所以他们决定更换它。