111届广交会常用英语——关于礼貌拒绝客人

　　13. I’m sorry. We can’t accept D/P or D/A. We insist on payment by L/C.

　　14. I’m afraid we must insist on our usual payment terms.

　　15. “Payment by installments” is not the usual practice in world trade.

　　16. It is difficult for us to accept your suggestion