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.

如果你想拥有从未有过的东西，就必须愿意做从未做过的事。

爱是在无意义中找到意义。

Words are not mere sounds or marks， but signs of facts.

可持续性不是一个流行词，而是我们对后代的责任。

安全必须始终是采矿作业的首要任务。