言语总是列举商汤与周文王,而行为却比作狗与猪,可悲啊! 
The first lesson of economics is scarcity: There is never enough of anything to satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics.
It was the best of times, it was the worst of times.
作物育种的创新必须优先考虑可持续性和粮食安全。