Secretary-General Kofi Annan said Monday he was "very disappointed and surprised" that his son had continued to receive payments until this February from a firm that had a contract with Iraq's oil-for-food program, the subject of numerous corruption investigations.

　　Annan told reporters that he had been working on the understanding that payments to his son, Kojo Annan, from the Swiss-based firm Cotecna Inspection S.A. stopped in 1998 "and I had not expected that the relationship continued."

　　On the understanding that是一个固定词组，表示“如果，以……为前提条件”，例如：Participants of this action will only be accepted on the understanding that they are aware of these risks and wish to participate of their own free will.（只有那些了解自己所冒的风险、并出于自愿的参与者才能够参加此次行动。） I gave her some money on the understanding that she should spend it on books .（我给了她一些钱，前提是她得把这钱花在买书上。）

　　此前，安南曾两度在联合国表示，他的儿子是在该公司实习，1999年底离开，并没有涉及该公司任何有关石油换食品计划合约。