The sale was supposed to last for a week, but for all practical purposes it's over.

减价销售原来预料一周, 然而实际上已经束了。

Your daughter does so little work at school, Mrs Brown, that for all practical purposes she might as well not be here at all.

布朗太太，您的女不怎么学习，她实际上根本不用来上学了。