bills under letter of credit

例句：

1. 1. The company has issued several bills under the letter of credit for overseas purchases.
   该公司已经为海外采购发行了几张信用证下的汇票。
2. 2. The bank will process the bills under the letter of credit for your business needs.
   银行将为您的业务需求处理信用证下的汇票。
3. 3. The exporter has to pay the bills under the letter of credit before the goods are shipped.
   出口商必须在货物装运前支付信用证下的汇票。