商业信函的7个“C”原则

    写信的原则（Writing Principles）已从原来的3个“C”（Conciseness¹, Clearness, Courtesy）发展到目前的７个“C”：Completeness, Clearness, Concreteness, Conciseness, Correctness, Courtesy, Consideration实例:
    Dear Sirs,With reference to your letter of April 9, we are pleased to accept your offer of 100 tons of Copper² Wire as per your Offer Sheet No.8/070/02B. Please go ahead and apply for your Export Licence. As soon as we are informed of the number of the Export Licence we will open the L/C by cable.
    信的本文汉译关于你们四月九日涵，我们高兴地接受你们第8／070／02Ｂ号报盘单所报100吨紫色铜丝。请着手办理申请出口许可证。一经接到出口许可证号码的通知，当即电开信用证。

1 conciseness   

n.简洁，简短

参考例句：

• Conciseness is served when the sentence is so corrected. 句子这样一改就简洁了。
• The topics of Diction section include Conciseness, Repetition Simple Words, and etc. 字法单元的主题包括简洁、重复、简单的字等等。

2 copper   

n.铜；铜币；铜器；adj.铜(制)的；(紫)铜色的

参考例句：

• The students are asked to prove the purity of copper.要求学生们检验铜的纯度。
• Copper is a good medium for the conduction of heat and electricity.铜是热和电的良导体。