求助：请求各位帮忙翻译这段话的意思.

求助：请求各位帮忙翻译这段话的意思.the vertical advances being memorized in the working memory, i.e. in the laydown memory which is active at present , are called up by means of this p-function.the vertical advances can be displayed and altered.for the data which are not to be changed ,the input has to be made in accordance with the column"display".