如果我们不考虑长期影响，开采效率就毫无意义。
Efficiency in extraction is meaningless if we don't consider the long-term impact.
The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.
I don't believe in the concept of a 'leading man'. I believe in the concept of a 'leading human being'.