I.定义

1.信用证：由银行签发，用来保证卖方能及时足额收到货款的保证书。常用于国际贸易，卖方为受益人。卖方向银行提交信用证及相关证明文件即可获得付款。

2.即期信用证：卖方满足信用证要求后，银行立即支付（五到十天内）的信用证。对卖方有利，能降低卖方现金流危机。

II.翻译方式

1.letter of credit available by draft at sight

2.letter of credit payable against draft at sight

3.letter of credit avaible by sight draft

4.letter of credit payable against sight draft

5.sight L/C【范文祥. 英文合同阅读与分析技巧：法律出版社，2007】