Stray birds of summer come to my window to sing and fly away.And yellow leaves of autumn,which have no songs,flutter and fall there with a sigh.
夏天的飞鸟，飞到我窗前唱歌，又飞去了。秋天的黄叶，他们没有什麼可唱的，只是叹息一声，飞落在那里。
The farmer's best implement is his mind.
The most important thing in auction design is to create an environment where bidders feel comfortable revealing their true valuations.