How are you ? what abou your family? what about your job? 一般是一些问候性的话语,不需要太长!老外不喜欢拐弯抹角。不喜欢像中国人一些,喜欢“代我问候你爸,妈,姐,弟,叔叔,婶婶,姥姥姥爷什么的!千万不要!然后提出自己的问题:I have a question about the calibration hints about engine for you since i doing the preparing work for the first firing for engine now!i need some help from you about the technical From your last letter ,i know you were testing the vehicle in 然后就是正文!详细说明问题,情况。就这些!