The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.
你把桃子投于我,我把李子回赠与你。桃子和李子价值相当,表明我本人是知恩图报的,也有互相赠送,礼尚往来的意思。