Translate the Chinese part in this dialogue to English orally. Mr . Wang: I want to know your terms of payment. Mr. Brown: 我们希望以不可撤销的信用证来付款。 Mr. Wang: Opening a L/C will increase our cost. 能否破例采用承兑交付款交 Mr. Brown: No, we always accept a letter of credit. You know that an irrevocable letter of credit will protect the exporter by the bank. We always require L/C for our exports. Mr.Wang : To meet you half way, what do you think if a half by L/C and the balance by D/P ? Mr. Brown: I’m afraid that we can’t accept it. Mr. Wang: OK. 如果我想让货物在新年到来前运到,我什么时候开信用证? Mr. Brown: Fourty days before the month of shipment. Mr. Wang: 我希望能在你方收到信用证时立即发货。 Mr. Brown: 您对此放心吧。 Mr. Wang: Thank you for your cooperation.