back [ bAk ] 1. (n.) opposite of front背面

　　[例] Please sign the cheque on the back.

　　[同义词] rear, reverse

　　2. (adj.) from the past过去的、拖欠的

　　[例] We have a lot of back orders.

　　3. (v.) support资助

　　[例] The bank backed my new venture.

　　[同义词] support, encourage

　　backdate [bAk5deIt] (v.) to put a date on a document that is earlier than the real date, so that it is valid from that earlier date 倒填日期

　　[例] He backdated the bill so that it can be valid.

　　[同义词] antedate

　　back order (n.) an order for goods that have not yet been produced or supplied积压定单

　　[例] After a long vacation, I found myself in a huge stack of back orders.

　　[同义词] backlog

　　back out (v) to give up or not do something after agreeing to do it不履行

　　[例] You will be charged for sure if you back out of the contract.

　　[同义词] default

　　backer [5bAkE(r)] (n.) person who supports financially资助者

　　[例] The company has some big backers.

　　[同义词] patron, sponsor, benefactor

　　backing [ 5bAkiN ] (n.) support, usually financial one资助

　　[例] Strong governmental baking makes the project very profitable.

　　backhander [5bAkhAndE(r)] (n. inf.) a bribe, money given under the table贿赂

　　[例] The chief director was arrested for his involvement in some backhander affairs.

　　[同义词] bribe

　　backlog [5bAklR^] (n.) build-up of work or orders which have not been processed积压的工作(或订单)

　　[例] The failure of the project was due to backlog of superior orders.

　　back up support 支持

　　[例] You should back up all claims you make.

　　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 [5bAlEns] (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

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（实习编辑：高奕飞）