To make the message specific, definite and vivid is the key point of concreteness. Whether you are writing an initial letter or a reply, you must make sure that your letter contains all the information your reader needs to act upon. Put yourself in the readers place. Avoid incomplete information. It is necessary to check the message carefully before it is sent out.
使信息具体、明确、生动是具体化的关键。无论你是写第一封信还是回信，你都必须确保你的信里包含了读者需要采取行动的所有信息。站在读者的角度思考，避免不完整的信息。在发送出去之前，必须仔细检查邮件。
