irrecoverable的例句（irrecoverable在句子中的用法）

• All business are to be transacted against confirm and irrecoverable letter of credit. 所有交易都应采用保兑的不可撤销信用证支付.
• The depression, however, caused many irrecoverable accounts and Dr. Sim started to run up debts. 然而经济萧条造成许多呆帐,他也因此负债累累.
• irrecoverable loss of sight 永久的失明