英语翻译

英语翻译
Mode of Payment:100% Irrevocable Confirmed Transferable L/C at Sight from Prime Bank.
Or
50% Advance at the time of Confrming the Order through T/T and Balance 50% at the time of Fax Copy of B/l.
另,如果可能请介绍相关词汇和常用表达法.