back-up( back up ) (n,v) to make a cope in case the original one is lost or damaged 备份

[例]  I made a back-up of that document in case of some unforeseen damage to it.

bad debt (n.) debt which will not be paid呆帐

[例]  The obvious decrease of bad debt avoided the bankruptcy of the big nation owned enterprise.

bad faith (n.) having a dishonest intention 欺诈

[例]  Bad faith will bring disasters to a cooperation in the long run.

[反义词]  integrity ，good-will

balance (n.) amount which makes the total credits and debits equal收支平衡（差额）、结余

[例]  Additional balance statement will charge 10 USD.

[同义词]  equilibrium, equipoise, evenness

balance of payments (n.) international financial position of a country (account of imports, exports and invisible earnings)贸易收支差额