四套

例句：

1. 1. We need to buy four sets of clothes for the party.
   我们需要为派对买四套衣服。
2. 2. She has a collection of antique books in her living room.
   她客厅里有一套古董书。
3. 3. He bought four sets of tools for his workshop.
   他为他的工作坊买了四套工具。