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to have somebody or something up one's sleeve
01
to have a hidden resource, plan, or advantage that can be used strategically when needed
Collocation
例子
Let's see if management has another card up its sleeve.
The negotiator always had a few bargaining tactics up his sleeve to secure the best deal.
Darren Kinder has a couple aces up his sleeve this week.
During the trial, the lawyer had a surprise witness up her sleeve to strengthen the case.
They usually have aces up their sleeves when they negotiate an important transaction.
