bill of materials (n.) list of all raw materials and parts that go into an end product材料清单

 billion [5biljEn ] (n.) US:one thousand million（美）十亿; GB: one million million（英）万亿

 black [ blAk ] (adj.) not allowed by law黑市的，非法交易的

 black market (n.) a situation of illegal trading in goods, currencies or services黑市

[例]  He bought some pirate CDs on the black market.

 in the black in credit（银行存款）有赢余

 black list list of goods, companies, people who are prohibited from trading黑名单

[例]  The customer is in the system black list so we can not provide trading service for him.

 blue chips (n.) shares with the highest status as investments, usually shares of well-established companies蓝筹股，热门的股票

[例]  Wise investors will show great interest in blue chips.

 blue-collar (adj.) relating to manual work体力劳动者

[例]  Your local newspaper is usually the best source of blue-collar jobs.

 board meeting (n) a gathering of the directors of a company to discuss important company business董事会

[例] He will chair the board meeting tomorrow on the takeover issues.

 board of directors (n.) group of people chosen by the shareholders to develop company policy董事会议

 [例] This proposal has been approved by the board of directors.

 bond [ bCnd ] (n.) contract document promising to repay money borrowed by a company or government债券

[例]  Most bonds are unsecured and do not grant shares in an organization.