唯一真正富有的是那些不想要比他们拥有的更多的人。
The only truly affluent are those who do not want more than they have.
China Gold should become a world-class mining company.
My greatest anxiety arises from the apprehension that I shall not be able to complete the work I have undertaken in the manner I wish.
相关性和因果关系之间的区别在实证工作中是根本性的。