used to be
人文科学

        v.(used for saying what was true in thepast,especially when you want to emphasize thatthis is not true now) formerly or once was以前是,曾经是:He isnt what he used to be.他不再是原来的他。Over the past three years the DeadSea has decreased by three meters and the wholear......（本文共 330 字）     [阅读本文] >>