Backup; spare; reserve; standby; alternate 请问是备用什么呢？ e.g., Most hospitals have backup generators in case of blackouts. It's best to always carry a spare tyre when driving long distances. I had to dip into my reserve funds when the business got into trouble.
备用风永生触州诗长厚信用证是什么意思
备用信用证的实质是一种银行担保，即开证行担保开证申请人会履行与受益人签订的合同中的相关义务。如果开证申请人没有履行备用信用证担保的义务，则受益人可以向开证行索取备用信用证项下的价款作为开证申请人对受益人的赔偿。
