We can kill two birds with one stone by dropping off the mail when we go to the grocery store.我们可以在去杂货店时顺便寄信，这样就能一举两得了。He said he had to go buy something or other at the grocery store.他说，他得去杂货店买点什么东西。She made out a shopping list before going to the grocery store.去杂货店之前，她列了一张购物单。