an extra message that you add at the end of a letter after your signature （信末署名後的）附言，又及➡PS
something extra that is added to sth after it has finished 补充；後记；跋◆HR plans are unfortunately treated as a postscript to the business planning process. 遗憾的是，人力资源计划被当成商业计划进程的一个附带文件。