(=I owe you).

n.借據(jù)

I don't have the money so I'll give you an IOU. 我沒有錢，所以會(huì)給你一張借據(jù)。

A bond, of course, is just an IOU, a promise to pay back money with interest by certain dates. 債券，當(dāng)然，這只是一個(gè)借據(jù)，承諾到期歸還并支付利息的紙條。