revocable letter of credit

例句：

1. 1. The contract is revocable until the end of the month.
   合同在月底之前是可撤销的。
2. 2.The bank's decision to revoke the loan was unexpected.
   银行决定撤销贷款的决定是出乎意料的。
3. 3. The agreement can be revoked at any time without penalty.
   该协议可以随时被撤销，且不承担任何责任。