短文翻译 A typical letter of credit may call for the following documents: an invoice, a bill of lading, marine insurance, a packing list, a weight list, an inspection certificate and a certificate of origin. In documentary letter of credit operations, all parties concerned actually deal in documents ,instead of goods. Therefore,banks must examine all the documents with great care to make sure that everything is in accordance with the terms and conditions of the credit. As a seller, you should always have a clear understanding of your risks in concluding a contract of sale and requirements in relation to the worthiness of the buyer, the political,economical and legal situation in the buyer' s country and the buyer' s own liquidity. This helps you to decide what kind of documentary letter of credit you may require - revocable letter of credit, unconfirmed irrevocable letter of credit or confirmed irrevocable letter of credit. Besides,the exporter also should make correct decisions on the exact type of credit, the period of validity, the transport route, the mode of transport, insurance cover, the price basis and so on. As a matter of fact, there are several types of credits. The most commonly used type of credit is the L/C payable at sight. That means the beneficiary gets the payment immediately after presentation of the stipulated shipping documents. There are also L/C at 30 day's sight, L/C at 60 day's sight, and L/C at 90 day's sight, etc.