stand-by letter of credit

例句：

1. 1. The bank issued a stand-by letter of credit to support the project.
   银行为该项目发行了备用信用证。
2. 2.The company is using a stand-by letter of credit to secure financing.
   该公司正在使用备用信用证来获得融资。
3. 3. The buyer requested a stand-by letter of credit to ensure timely payment.
   买方要求开具一份备用信用证，以确保及时付款。