经济发展理论研究的是经济系统如何产生不断改变它的力量。
Our younger generation are going to transform this country while at the same time being transformed themselves.
数学的乐趣在于发现模式并理解它们的含义。
我们必须记住,历史是由胜利者书写的,但记忆却是由失败者保存的。
The death of a beautiful woman is, unquestionably, the most poetical topic in the world.