I'm sorry. For these large orders, we insist on payment by L C.
對不起。對于這樣金額大的訂單,我們堅持用信用證支付。
would be like trying to meet a friend in London without a pre-arranged rendezvous and absurdly wandering the streets in the hope of a chance encounter.
就如同去倫敦見一位朋友,事先未約定地點,而荒唐地在街上游逛,以期待碰巧遇上一樣。