柯林斯词典casing /ˈkeɪsɪŋ/ (casings) 1. N-COUNT A casing is a substance or object that covers something and protects it. 保护套[oft supp N] ...the outer casings of missiles. ...导弹的外部保护层。 返回 casing剑桥词典a covering that protects something 外包装，箱，盒，罩，套 返回 casing