决定劳工工资的不是雇主的仁慈，而是雇主之间的竞争。
It is not the benevolence of the employer that determines the wages of labor， but the competition among employers.
A map of the world which does not include Utopia is not worth even glancing at.
在观察性研究中，我们常常不得不依赖于无法直接检验的假设。
The cycle of poverty begins with the abandonment of hope.
如果你不冒险，你将永远为那些敢于冒险的人工作。
If you shed tears when you miss the sun,you also miss the stars.
最成功的企业是那些将其目标与客户需求保持一致的企业。