在外贸业务中，从报价到支付条件，再到催开 信用证 ，再到后来的单据结汇，涉及到很多专业 术语 。
1.支付条件（Terms of payment)
（1）Our usual way of payment is by confirmed and irrevocable letter of credit available by draft at sight for the full amount of the contracted goods to be established in our favour through a bank acceptable to the sellers.
我们的一般付款方式是保兑的、不可撤销的、以我公司为受益人的、足额 信用证 ，见票即付。 信用证 应通过为卖方认可的银行开出。
（2）For payment,we require 100% value,confirmed and irrevocable letter of credit with partial shipment and transhipment allowed clause,available by draft at sight,payable against surrendering the full set of shipping documents to the negotiating bank here.
（3）The letter of credit should be established with its clauses in confirmation with the terms and conditions of the contract.
（4）We usually accept payment by L/C at sight draft or by T/T in advance,but never by C.O.D.
2.催开信用证(Pressing for L/C)
（1）As the goods against your order No.111 have been ready for shipment for quite some time,it is imperative that you take immediate action to have the covering credit established as soon as possible.
（2）We repeatedly requested you by faxes to expedite the opening of the relative letter of credit so that we might effect shipment for the above mentioned order,but after the lapse of 3 months,we have not yet received the covering L/C.
（3）We hope that you will take commercial reputation into account in all seriousness and open L/C at once,otherwise you will be responsible for all the losses arising therefrom.
（4）The shipment time for your order is approaching,but we have not yet received the covering L/C.Pls do your utmost to expedite the same to reach here before the end of this month so that shipment may be effected without dealy.
3.修改信用证 (Amendment to L/C)
（1）Pls amend the foregoing L/C to read piece length in 30 yards instead of 40 yards.
（2）We would draw your attention to the fact that the construction of our Art.No.3100S is 32X32 78X65 whereas your credit calls for 30X30 78X65.Therefor,you are requested to amend the credit according to the stipulationof the contract.
我们提请贵方注意，我方坯布的规格为32X32 78X65，而贵方信用证却规定30X30 78X65，故请按照合约规定修改信用证。
（3）Pls extend the shipment date and the validity of your L/C No.111 to the end of Jan. and Feb.15,2006 respectively,and see to it that the amendment adivce will reach us before the end of Dec.2005.
（4）We have received your L/C No.111 covering the above -mentioned contract.But on checking up its clauses,we find that it calls for shipment to be effected not latter than Nov.10,2005,whereas the contract stipulates shipment Dec.2005.Pls extend the shipment date to the Dec.15th 2005 and validity to the 31st of Dec.