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.

生命中最美好的东西都是免费的。显然，我们最宝贵的资源是时间。

I believe in love at first sight because I'm a musician.

世界需要可靠的能源，而煤炭仍然在其中发挥着关键作用。

计算机网络中最重要的东西是协议。