a barrel of monkeys的用法和样例：
- To watch the kittens play was as funny as a barrel of monkeys.
- I can't leave my youngest son alone in the house for a moment. He's as crafty as a barrel of monkeys and gets up to any number of tricks and then appears all innocence when you return.
- How much does a barrel of oil cost?
- He has a barrel of money about him.
- They drank a barrel of beer at the party.