寫信的原則（writing principles）已從原來(lái)的3個(gè)“c”（conciseness, clearness, courtesy）發(fā)展到目前的7個(gè)“c”：completeness, clearness, concreteness, conciseness, correctness, courtesy, consideration

    實(shí)例:

    dear sirs,
　　　　　　　　　　　　　　　　
　　with reference to your letter of april 9, we are pleased to accept your offer of 100 tons of copper 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.


    信的本文漢譯

    關(guān)于你們四月九日涵，我們高興地接受你們第8/070/02b號(hào)報(bào)盤單所報(bào)100噸紫色銅絲。請(qǐng)著手辦理申請(qǐng)出口許可證。一經(jīng)接到出口許可證號(hào)碼的通知，當(dāng)即電開信用證。