【正文】 letters written between one firm and another to convey and exchange information, news, ideas or opinions. But a business letter is effective only if it reflects in the mind of the receiver a true image of the thought conveyed by the writer. We should be skilled in using some writing skills except certain writing principles. Simple words best More simple and mon words, less lengthy and unmon words, in order to reduce misunderstandings. And the readers can quickly understand the meaning what you want to express. For example, “never” instead of “under the no circumstances”, “as you requested” instead of “as per your requested”, “expedite” “speed up” instead. Adopt the right tone If a business letter is t achieve its purpose, its tone must be right. Before beginning to write think carefully about the way in which you want to influence your reader. Ask yourself, “What do I want this letter to do?” and then express yourself accordingly, being persuasive, apologetic, obliging, firm and so on, depending on the effect you want to produce. As we all know, people would like to hear that something could be done and what they could get. Note the use of jargon The frequent use of the jargon and acronyms is a major feature of the English Business Letter Writing. In order to avoid resulting in serious losses, we should be skilled in using the terms. There are many Business English terminologies. For 長春職業(yè)技術(shù)學(xué)院畢業(yè)論文（設(shè)計）專用紙 example, insurance policy, premium, letter of credit or L / C, CIF, FOB, container, bill of lading. Use active voice rather than passive voice Generally, active voice produces a more concise and powerful sentence than passive voice. An active construction immediately identifies the sentence’s subject so readers can quickly understand and visualize who is doing what. Because of this clarity, the active voice is almost the best choice in posing documents that are intended primarily to exchange information, such as foreign trade letters and memos. In business writing, the passive sentence is usually used to state something unpleasant or something that has been done improperly by the reader to make the writing more objective and courteous. For example, Poor: Your letter of June 12 was received by us today. Better: We received your letter of June 12 today. Vary sentence length Short sentences lead to clear meaning and easy understanding, but overlong Sentences may obscure the intention with too much information and being confusing. However, a series of short sentences may seem boring. It works better to vary. The average sentence length is about 1518 words. This is the best length the reader to understand quickly the meaning. Therefore, we had better use long sentences and short Sentences interchangeably so that we can give a deep impression on the readers. Have suitable paragraphs length 長春職業(yè)技術(shù)學(xué)院畢業(yè)論文（設(shè)計）專用紙 The opening paragraph and the concluding paragraph length should not exceed 34 lines. If an opening paragraph is too long, it can make the readers feel tired and do not want to take the time to read on. A concluding paragraph should be also concise, clearly and pletely expresses what you mean. In addition, the body paragraph should be no more than eight lines. In business writing, it is suitable for paragraphs to contain 78 lines. If a paragraph is too long, it may make the main idea unclear and lead to a loose structure. If a paragraph is too short, your reader may be impressed that your topic is not adequately supported. Pay attention to first and last impressions The letters you send out must create good first and last impressions. To achieve this, “put yourself in your reader’s shoes” and try to image how he will feel about what you write. Avoid oldfashioned phrases, such as “We are in receipt of your letter…” “We have for acknowledged your letter…” Although they are grammatically correct, they tend to be dull. Avoid the kind of ending introduced by a participle. Thanking you in anticipation and similar endings are no longer used in modern letterwriting. They mean nothing and serve no useful purpose. Check your letters Be careful to create a good impression with each of your letters. Before signing, check it for the accuracy of its contents and test its general suitability against such questions as these. For example, a. Is it correctly slept and properly punctuated? b. Does it cover all essential points and information? c. Does it sound natural a