1. have sth. up one's sleeve : 有锦囊妙计, 有应急之策；
名词
促销
1. 袖子
The sleeves of a coat, shirt, or other item of clothing are the parts that cover your arms.
2. (唱片)封套
A record sleeve is the stiff envelope in which a record is kept.
1. the part of a garment that is attached at the armhole and that provides a cloth covering for the arm
Synonym: arm
2. small case into which an object fits