寫信時要處處從對方的角度去考慮有什么需求，而不是從自身出發(fā)，語氣上更尊重對方。
　　例如：
　　 "You earn 2 percent discount when you pay cash. We will send you the brochure next month. "

　　就比"We allow 2 percent discount for cash payment. We won't be able to send you the brochurethis month." 要好。
 
三、Completeness 完整
 
    一封商業(yè)信函應(yīng)概況了各項必需的事項，如邀請信應(yīng)說明時間、地點等，確忌寄出含糊不清的信件。
 
四、Clarity 清楚
 
    意思表達明確，要注意：
 
    （一）避免用詞錯誤：
 
    例如：As to the steamers sailing from Hong Kong to San Francisco, we have bimonthly direct

services.
　
　此處bimonthly有歧義：可以是twice a month 或者once two month.故讀信者就迷惑了，可以改寫為：
 
    1.We have two direct sailings every month from Hong Kong to San Francisco.
    2.We have semimonthly direct sailing from Hong Kong to San Francisco.
    3.We have a direct sailing from Hong Kong to San Francisco.