名詞 iou:

1. an informal debt instrument; representing `I owe you'

1. I haven't any money; can I give you an IOU for￡5?
   我沒錢了，我可以給你一張借條借五鎊嗎？
2. I haven't any money; can I give you an IOU for$10?
   ＂我沒錢了，我可以給你一張借條借十塊錢嗎？＂

IOU

n.（名詞）
【復數(shù)】 IOU`s 或 IOUs
A promise to pay a debt, especially a signed paper stating the specific amount owed and often bearing the letters IOU.
借據(jù)：還債的許諾，特別是指一張簽了名的紙，上面寫清了具體的錢數(shù)并常有IOU這幾個字母

來源：
[From the pronunciation of] I owe you
[來自] I owe you