第五周额外作业：外贸合同常用条款1. Terms of Payment:付款方式：(1) Letter of Credit: The Buyer shall, _ days prior to the time of shipment/after this Contract comes into effect, open an irrevocable Letter of Credit in favor of the Seller. The Letter Of Credit shall expire _ days after the completion of loading of the shipment as stipulated.参考译文（1）信用证方式：买方应该在装运期前/ 合同生效后_ 日，开出以卖方为受益人的不可撤销信用证。信用证在按照合同装船完毕后_日内到期。Copying structure: 买方应与_日前向装运时间/合同生效后，开出。（语句不通，没有检查）用词谨慎：（1）买方应该在装运期前（合同生效后）_
