出差的英文是I met my friend when I was on a business trip in Shanghai.短文表达的意思是，出差有时间的规定，而且出差的日子都比较短。

描述出差英文短文如下：

Business trips have to be approved by the employer, who usually meets the costs. The traveling expenses can be calculated in detail or by a lump sum, depending on the average expense of the travel country. For activities away, the correspondent term in military is duty travel, in politics facility trip.