circular (n.) a copied leaflet which is sent to people 传单，大量分发的广告页
[例] Have you seen the circular handed out in the street?
[同义词] notice, advertisement
claim 1. (n.) request for money 索赔
[例] We put in an insurance claim after the accident.
2. (v.) ask for money 索赔
[例] We claimed $50,000 for the damaged car.
claimant (n.) a party that makes a claim（根据权利）提出要求者, 原告
classified advertisement (n.) short ads in a newspaper or magazine placed by people offering or asking for a product or service, or who are offering or looking for employment 分类广告
[例] I will place a classified ad for the coming auction.
clear (v.) 1.to dispose of goods 抛售
[例] The stock sold their goods at cost price in an attempt to clear old stock.
2.to pass goods through customs 清关
[例] clear the goods
clear (adj.) net 净的
[例] The clear profit is very little after deduction of all expenses.
clerk (n.) person employed in an office to do routine tasks 职员
[例] She was employed as a bank maintenance clerk after her graduation.
client (n.) person or company buying a service 客户
[例] Nowadays good service is a very important aspect to the bank’s clients.
clientele (n.) a body of customers or patrons 顾客（总称）
[例] a restaurant's clientele
Co (n.) abbreviation for company 公司的缩写
cold (adj.) not approached before 冷不防的
[例] He gave me a cold call this afternoon but we didn’t have any appointment.
collaboration (n.) working together 协作
[例] The efficient collaboration will bring mutual benefit to both sides.
collective bargaining (n.) negotiations between unions and employers about conditions, wages, etc. 集体协定，劳资双方就工资等问题谈判
[例] Labor union is making collective bargaining with employers of that factory.
come up with (v.) put forward (an idea) 提出
[例] come up with an original idea
commercial (adj.) of or relating to commerce 商业的
[例] commercial area
[同义词] trading, mercantile
commercial (n.) advertisements on TV or radio （电视插播的）商业广告
[例] The aim of the repetitions of the same commercial on television is nothing but to brainwash consumers into compulsive consumption.
commercialize (v.) make something make money 使商业化
[例] They have a good research reputation but they find it difficult to commercialize their products.
commission (n.) proportionate amount of money paid to a sales person/agent, usually a percentage of the sales made 佣金
[例] We offered the agent a 10% commission.