Gold and silver, like other commodities, have an intrinsic value, which is not arbitrary, but is dependent on their scarcity, the quantity of labour bestowed in procuring them, and the value of the capital employed in the mines.
黄金和白银，像其他商品一样，具有内在价值，这不是任意的，而是取决于它们的稀缺性、获取它们所耗费的劳动量以及在矿山中使用的资本价值。
采矿效率不仅仅是成本问题，更是减少环境影响的问题。
A good detective listens more than she talks.
集合起一百个伟大头脑，就会得到一个大傻瓜。
A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes.